Sab saum toj 10 Cov Tuam Txhab Aerospace Hauv Ntiaj Teb 2022

Hloov kho tshiab kawg rau lub Cuaj Hlis 7, 2022 thaum 01:14 teev tsaus ntuj

Ntawm no koj tuaj yeem pom Daim Ntawv Teev Npe ntawm 10 Tus Thawj Coj Aerospace Cov tuam txhab tsim khoom nyob rau hauv lub ntiaj teb no 2021. Airbus yog lub loj tshaj plaws nyob rau hauv cov npe ntawm saum toj kawg nkaus 10 aircraft manufacturers nyob rau hauv lub ntiaj teb no raws li Raytheon.

Sab saum toj 10 Leading Aerospace Manufacturing Companies

Yog li ntawm no yog cov npe ntawm Top 10 Leading Aerospace Manufacturing Companies hauv ntiaj teb.

1. Airbus XWB

Ntawm cov npe ntawm 10 lub tuam txhab dav hlau saum toj kawg nkaus Airbus yog lub chaw tsim khoom lag luam dav hlau, nrog Chaw thiab Tiv Thaiv thiab Helicopters Divisions, Airbus yog qhov loj tshaj plaws aeronautics thiab chaw. tuam txhab nyob teb chaws Europe thiab ib tug tus thawj coj thoob ntiaj teb. 

Airbus tau ua rau nws cov cuab yeej cuab tam nyob sab Europe muaj zog los ua thoob ntiaj teb tiag tiag - nrog kwv yees li 180 qhov chaw thiab 12,000 tus neeg muab khoom ncaj qha thoob ntiaj teb. Ib lub tuam txhab Aerospace Engineering loj tshaj plaws hauv ntiaj teb.

Cov tuam txhab Aerospace muaj dav hlau thiab nyoob hoom qav taub zaum kawg sib dhos kab thoob plaws Asia, Europe thiab Asmeskas, thiab tau ua tiav ntau tshaj li 2000 npaug ntawm daim ntawv xaj nce txij li xyoo XNUMX. Airbus yog lub tuam txhab loj tshaj plaws Aerospace Manufacturing.

• Net Muag: $ 79 Billion
• neeg ua hauj lwm: 134,931

Airbus yog tus tswv cuab ntawm cov chaw muab kev pabcuam foob pob hluav taws MBDA thiab tus khub tseem ceeb hauv Eurofighter consortium. Cov tuam txhab Aerospace tseem muaj 50% cov koom tes hauv ATR, lub tuam txhab turboprop aircraft, thiab AirianeGroup, cov chaw tsim khoom ntawm Ariane 6 launcher. Airbus yog lub tuam txhab dav hlau loj tshaj plaws hauv ntiaj teb.

2. Raytheon Technologies

Raytheon yees yog lub ntiaj teb no muab kev pabcuam cov khoom siv technology siab thiab kev pabcuam
mus rau lub tsev systems thiab aerospace industries. Lub tuam txhab yog 2nd loj tshaj plaws Aerospace Engineering tuam txhab nyob rau hauv lub ntiaj teb no.

Lub tuam txhab yog ib daim ntawv teev npe saum 10 aircraft manufacturers. Cov tuam txhab Aerospace kev ua haujlwm rau lub sijhawm uas tau hais hauv no tau muab faib ua plaub ntu kev lag luam tseem ceeb:

• Otis,
• Tus neeg nqa khoom,
• Pratt & Whitney, thiab
• Collins Aerospace Systems.

Otis thiab Carrier raug xa mus rau "kev lag luam lag luam," thaum Pratt & Whitney thiab Collins Aerospace Systems raug xa mus rau "kev lag luam aerospace."
Thaum Lub Rau Hli 9, 2019, UTC tau nkag mus rau hauv daim ntawv cog lus sib koom ua ke nrog Raytheon Tuam Txhab (Raytheon) muab kev koom ua ke tag nrho ntawm cov khoom sib npaug.

• Net Muag: $ 77 billion

United Technologies, suav nrog Collins Aerospace Systems thiab Pratt & Whitney, yuav yog cov khoom lag luam zoo tshaj plaws rau aerospace thiab kev tiv thaiv kev lag luam. Ntawm cov npe ntawm cov tuam txhab aerospace loj tshaj plaws hauv ntiaj teb. Lub tuam txhab yog qhov thib ob loj tshaj plaws Aerospace Manufacturing tuam txhab.

Otis, lub ntiaj teb ua cov chaw tsim khoom ntawm elevators, escalators thiab txav txoj kev; thiab Carrier, lub ntiaj teb no muab kev pab cuam ntawm HVAC, tub yees, tsev automation, hluav taws kev ruaj ntseg thiab kev ruaj ntseg khoom nrog cov thawj coj nyob rau hauv nws cov portfolio.

3. Boeing Aerospace tuam txhab

Boeing yog lub ntiaj teb cov tuam txhab dav hlau loj tshaj plaws thiab cov chaw tsim khoom lag luam dav hlau dav hlau, kev tiv thaiv, qhov chaw thiab kev ruaj ntseg, thiab cov chaw muab kev pab cuam tom qab muag.

Boeing cov khoom lag luam thiab cov kev pabcuam tsim nyog suav nrog kev lag luam thiab tub rog dav hlau, satellites, riam phom, hluav taws xob thiab kev tiv thaiv, kev tsim tawm, cov ntaub ntawv tshaj lij thiab kev sib txuas lus, thiab kev ua haujlwm raws li kev thauj mus los thiab kev cob qhia.

• Net Muag: $ 76 Billion
• Ntau tshaj 150 lub teb chaws
• Cov Neeg Ua Haujlwm: 153,000

Boeing muaj kev lig kev cai ntev ntawm cov tuam txhab aerospace kev coj noj coj ua thiab kev tsim kho tshiab. Cov tuam txhab Aerospace txuas ntxiv nthuav nws cov khoom lag luam thiab cov kev pabcuam kom tau raws li cov neeg siv khoom xav tau. Ib qho ntawm cov tuam txhab Aerospace Engineering.

Cov tuam txhab Aerospace muaj ntau yam peev xwm suav nrog tsim cov tswv cuab tshiab, muaj txiaj ntsig zoo ntawm nws tsev neeg lub dav hlau ua lag luam; tsim, tsim thiab koom ua ke cov tub rog platforms thiab kev tiv thaiv systems; tsim cov cuab yeej technology siab heev; thiab npaj cov nyiaj txiag tshiab thiab kev xaiv kev pabcuam rau cov neeg siv khoom.

Boing yog thib peb loj tshaj plaws Aerospace Manufacturing Companies thiab ntawm cov npe ntawm cov npe saum 10 aircraft manufacturers. Boeing tau teeb tsa ua peb lub lag luam:

• Kev lag luam dav hlau;
• Kev tiv thaiv,
• Chaw & Kev Ruaj Ntseg; thiab
• Boeing Ntiaj Teb Kev Pabcuam, uas tau pib ua haujlwm thaum Lub Xya Hli 1, 2017.  

Cov tuam txhab Aeronautical Txhawb nqa cov chav no yog Boeing Capital Corporation, lub ntiaj teb muab kev daws teeb meem nyiaj txiag. Boing yog lub tuam txhab dav hlau loj tshaj plaws hauv Tebchaws Meskas.

Tsis tas li ntawd, cov koom haum ua haujlwm ua haujlwm thoob plaws lub tuam txhab tsom mus rau engineering thiab kev tswj hwm txoj haujlwm; technology thiab kev txhim kho-kev ua haujlwm; advanced tsim thiab tsim tshuab; kev nyab xeeb, nyiaj txiag, kev ua tau zoo thiab kev txhim kho kev tsim khoom thiab cov ntaub ntawv thev naus laus zis.

4. Tuam Tshoj North Industries Group

Tuam Tshoj North Industries Corporation (NORINCO) yog ib pawg lag luam loj heev koom nrog cov khoom lag luam thiab kev lag luam peev, koom nrog R & D, kev lag luam, thiab kev pabcuam. Ntawm cov npe ntawm Top Aerospace Manufacturing Companies

NORINCO feem ntau cuam tshuam nrog cov khoom tiv thaiv, roj av & cov khoom siv hluav taws xob siv hluav taws xob, kev cog lus engineering thoob ntiaj teb, cov khoom tawg thiab tshuaj lom neeg, khoom siv tes ua kis las & khoom siv, tsheb thiab kev lag luam logistics, thiab lwm yam.

• Net Muag: $ 69 Billion

NORINCO tau nyob rau hauv qeb ntawm cov thawj coj ntawm lub xeev cov lag luam nyob rau hauv cov nqe lus ntawm tag nrho cuab tam thiab nyiaj tau los. Technology nyob rau hauv precision demolition & annihilation systems, amphibious nres nrog ntev npaum li cas suppression riam phom systems, anti-aircraft & anti-missile systems, cov ntaub ntawv & hmo ntuj tsis pom kev, zoo heev ua phem & rhuav tshem systems, tiv thaiv kev ua phem & tiv thaiv kev kub ntxhov.

NORINCO tau txais kev ntseeg siab los ntawm cov neeg siv khoom rau nws cov khoom zoo thiab cov kev pabcuam zoo heev. NORINCO tau mob siab rau kev lag luam roj av hauv tsev thiab txawv teb chaws hauv kev lag luam ntawm cov peev txheej prospecting, exploitation thiab trading, thiab nquag txhawb kev lag luam industrialization.

Thaum tau tsim nws cov khoom lag luam hauv cov kev pabcuam xws li kev cog lus engineering thoob ntiaj teb, kev cia khoom & kev thauj mus los thiab tsheb, NORINCO tuav cov neeg tawg rog & tshuaj lom neeg, cov khoom siv hluav taws xob, thiab cov cuab yeej ua kis las raws li kev koom ua ke ntawm thev naus laus zis, kev lag luam thiab kev lag luam.

NORINCO tau tsim lub ntiaj teb kev ua haujlwm thiab cov ntaub ntawv xov xwm thiab tsim lub ntiaj teb-divers NORINCO yuav txuas ntxiv txhawb cov khoom lag luam tshiab, ua kom thev naus laus zis & kev pabcuam txhim kho thiab sib koom ua tiav ntawm kev txhim kho.

5. Aviation Industry Corp. ntawm Tuam Tshoj

Lub Tuam Txhab Kev Lag Luam Kev Lag Luam ntawm Tuam Tshoj, Ltd. (AVIC) tau tsim tsa lub Kaum Ib Hlis 6th, 2008 los ntawm kev txhim kho thiab kev sib koom ua ke ntawm Tuam Tshoj Aviation Industry Corporation Ι (AVIC Ι) thiab Tuam Tshoj Aviation Industry Corporation ΙΙ (AVIC ΙΙ).

• Net Muag: $ 66 Billion
• 450,000 cov neeg ua haujlwm
• Ntau tshaj 100 lub koom haum,
• 23 npe tuam txhab uas muag

Cov tuam txhab Aerospace yog lub hauv paus rau kev tsav dav hlau thiab muab cov kev pabcuam tiav rau cov neeg siv khoom hauv ntau qhov haujlwm - los ntawm kev tshawb fawb thiab kev tsim kho mus rau kev ua haujlwm, tsim khoom thiab nyiaj txiag. Ntawm cov npe ntawm cov tuam txhab Aerospace Engineering saum toj kawg nkaus.

Lub tuam txhab lag luam cov tuam txhab suav nrog kev tiv thaiv, thauj dav hlau, nyoob hoom qav taub, avionics thiab tshuab, dav dav dav hlau, kev tshawb fawb thiab kev tsim kho, kev sim davhlau, kev lag luam thiab kev xa khoom, kev tswj cov khoom muaj nqis, kev pabcuam nyiaj txiag, engineering thiab kev tsim kho, tsheb thiab lwm yam.

AVIC tau tsim cov khoom tsim tau zoo thiab cov kev txawj ntse hauv kev tsim khoom thiab kev lag luam siab. Lub tuam txhab koom ua ke aviation science thiab thev naus laus zis rau hauv cov khoom siv tsheb thiab qhov chaw, LCD, PCB, EO txuas, Lithium hwj chim roj teeb, cov cuab yeej ntse, thiab lwm yam. Ntawm cov npe ntawm cov tuam txhab lag luam Aerospace zoo tshaj plaws

6. Lockheed Martin

Headquartered nyob rau hauv Bethesda, Maryland, Lockheed Martin yog lub ntiaj teb no kev ruaj ntseg thiab aerospace tuam txhab uas muag thiab yog feem ntau koom nyob rau hauv kev tshawb fawb, tsim, kev loj hlob, tsim, kev koom ua ke thiab txhawb nqa ntawm advanced technology systems, khoom thiab cov kev pab cuam.

• Net Muag: $ 60 Billion
• Ua haujlwm kwv yees li 110,000 tus neeg thoob ntiaj teb

Lub Tuam Txhab Kev Ua Haujlwm suav nrog 375+ cov chaw thiab 16,000 tus neeg muag khoom nquag, suav nrog cov neeg muag khoom hauv txhua lub xeev Asmeskas thiab ntau dua 1,000 tus neeg xa khoom hauv ntau dua 50 lub teb chaws sab nraum Teb Chaws Asmeskas Ib lub tuam txhab tsim hluav taws xob loj tshaj plaws hauv ntiaj teb.

Aeronautics, nrog kwv yees li $ 23.7 nphom hauv 2019 kev muag khoom uas suav nrog tactical aircraft, airlift, thiab aeronautical tshawb fawb thiab kev loj hlob kab ntawm kev lag luam. Lub tuam txhab yog ib qho zoo tshaj plaws Aerospace Engineering tuam txhab uas muag nyob rau hauv lub ntiaj teb no.

Missiles thiab hluav taws tswj, nrog kwv yees li $ 10.1 nphom hauv 2019 kev muag khoom uas suav nrog Terminal High Altitude Area Defense System thiab PAC-3 Missiles raws li qee qhov ntawm nws cov kev pabcuam siab.

Rotary thiab Lub Hom Phiaj Systems, nrog kwv yees li $ 15.1 nphom hauv 2019 kev muag khoom, uas suav nrog Sikorsky tub rog thiab kev lag luam nyoob hoom qav taub, naval systems, platform kev koom ua ke, thiab simulation thiab kev cob qhia kab ntawm kev lag luam.

Space, nrog kwv yees li $ 10.9 nphom hauv 2019 kev muag khoom uas suav nrog qhov chaw tso tawm, kev lag luam satellites, tsoomfwv satellites, thiab cov phiaj xwm phiaj xwm kev lag luam.

7. General Dynamics

Cov tuam txhab Aerospace muaj cov qauv kev lag luam sib npaug uas muab txhua chav ua lag luam ua kom yooj yim kom nyob twj ywm thiab tswj kev nkag siab zoo ntawm cov neeg siv khoom. Ntawm cov npe ntawm 10 saum toj kawg nkaus aircraft manufacturers.

GD yog cov npe ntawm 10 qhov zoo tshaj plaws Aerospace Manufacturing tuam txhab uas muag. General Dynamics yog 7th nyob rau hauv cov npe ntawm 10 Aerospace Engineering tuam txhab uas muag nyob rau hauv lub ntiaj teb no. General Dynamics tau teeb tsa ua tsib pawg lag luam:

• Aerospace tuam txhab uas muag,
• Sib ntaus sib tua Systems,
• Ntaub Ntawv Technology,
• Mission Systems thiab
• Marine Systems.

• Net Muag: $ 39 Billion

Lub Tuam Txhab Portfolio nthuav dav thaj tsam ntawm lub ntiaj teb cov kev lag luam thev naus laus zis tshaj plaws dav hlau, tsheb sib tw tsheb, kev hais kom ua thiab tswj cov tshuab thiab nuclear submarines.

Txhua lub tuam txhab lag luam yog lub luag haujlwm rau kev ua tiav ntawm nws cov tswv yim thiab kev ua haujlwm ua haujlwm. Lub tuam txhab cov thawj coj hauv tuam txhab tau teeb tsa lub tswv yim tag nrho ntawm kev lag luam thiab tswj kev faib cov peev. Cov tuam txhab Aerospace tshwj xeeb ua rau lub tuam txhab tsom mus rau qhov tseem ceeb - xa cov lus cog tseg rau cov neeg siv khoom los ntawm kev txhim kho tsis tu ncua, txuas ntxiv kev loj hlob, txhawb nqa rov qab los ntawm peev peev thiab kev qhuab qhia peev.

8. Tuam Tshoj Aerospace Science & Kev Lag Luam

Tuam Tshoj Aerospace Science thiab Industry Corporation Limited (CASIC) yog ib lub tuam txhab loj hauv xeev hi-tech tub rog uas yog nyob rau hauv kev tswj hwm ncaj qha los ntawm tsoomfwv hauv nruab nrab ntawm Tuam Tshoj. Tsim los ua Fifth Academy ntawm Ministry of Defense.

Raws li ib qho ntawm 500 lub tuam txhab hauv ntiaj teb thiab ntawm 100 lub tuam txhab tiv thaiv thoob ntiaj teb, CASIC yog lub pob txha ntawm qhov chaw lag luam ntawm Tuam Tshoj, thiab tus thawj coj hauv kev txhim kho Tuam Tshoj txoj kev lag luam xov xwm.

• Net Muag: $ 38 Billion
• Cov Neeg Ua Haujlwm: 1,50,000
• CASIC muaj 19 lub chaw soj ntsuam tseem ceeb hauv tebchaws
• 28 science & technology innovation platforms
• muaj 22 lub koom haum thiab tuav cov khoom ntawm 9 lub tuam txhab npe

Ua raws li "Belt and Road" Initiative, CASIC muab kev sib tw tiv thaiv cov khoom lag luam thiab ua tiav cov kev daws teeb meem rau kev lag luam thoob ntiaj teb hauv tsib lub lag luam loj, xws li kev tiv thaiv huab cua, kev tiv thaiv dej hiav txwv, kev tawm tsam hauv av, kev sib ntaus sib tua tsis muaj neeg, thiab cov ntaub ntawv & hluav taws xob tiv thaiv, thiab muaj tsim kev sib raug zoo nrog ntau dua 60 lub teb chaws thiab cheeb tsam hauv Asia, Africa, Europe thiab Latin America, pab txhawb kev tswj hwm thaj chaw ruaj ntseg thiab ntiaj teb kev thaj yeeb.

Nws cov khoom siv high-end sawv cev los ntawm HQ-9BE, YJ-12E, C802A, BP-12A, thiab QW tau dhau los ua cov khoom lag luam hnub qub hauv kev lag luam thoob ntiaj teb. Ntawm cov npe ntawm cov tuam txhab Aerospace Engineering saum toj kawg nkaus.

CASIC tau tsim kom muaj kev ywj pheej ntawm kev tsim kho thiab kev tsim khoom rau kev lag luam aerospace xws li cov khoom siv foob pob hluav taws thiab cov khoom siv thev naus laus zis. Lub tuam txhab yog cov npe ntawm 10 zoo tshaj plaws Aerospace Manufacturing tuam txhab uas muag.

Kaum ob ntawm cov khoom lag luam tsim los ntawm CASIC tau txhawb nqa lub community launch ntawm "Shenzhou", docking ntawm "Tiangong", kev tshawb fawb lunar ntawm "Chang'e", kev sib txuas ntawm "Beidou", kev tshawb nrhiav Mars ntawm "Tianwen" thiab kev tsim kho ntawm "chaw nres tsheb chaw" , ntseeg tau lav qhov ua tiav ntawm cov haujlwm tseem ceeb hauv tebchaws aerospace.

9. Tuam Tshoj Aerospace tuam txhab uas muag Science & Technology

CASC, yog ib lub tuam txhab Fortune Global 500, yog ib pawg tuam txhab lag luam loj hauv xeev nrog nws tus kheej kev txawj ntse thiab cov khoom lag luam nto moo, muaj peev xwm ua tau zoo, thiab muaj kev sib tw tseem ceeb.

Keeb kwm los ntawm Fifth Academy ntawm Ministry of National Defense tau tsim nyob rau xyoo 1956 thiab muaj kev hloov pauv keeb kwm ntawm Lub Xya Hli Ministry of Machinery Industry, Ministry of Astronautics, Ministry of Aerospace Industry, thiab Tuam Tshoj Aerospace Corporation, CASC tau tsim tsa lub Xya Hli 1. , xyoo 1999.

• Net Muag: $ 36 Billion
• 8 loj R & D thiab ntau lawm complexes
• 11 lub tuam txhab tshwj xeeb,
• 13 npe tuam txhab uas muag

Aerospace Manufacturing Companies Raws li tus thawj coj ntawm Tuam Tshoj txoj kev lag luam chaw thiab ib qho ntawm Tuam Tshoj thawj lub lag luam tshiab. Ib lub tuam txhab Aerospace Engineering saum toj kawg nkaus hauv Suav teb.

CASC feem ntau yog koom nrog hauv kev tshawb fawb, tsim, tsim, sim thiab tso tawm cov khoom siv hauv chaw xws li lub tsheb, satellite, manned spaceship, cargo spaceship, deep space explorer thiab space station as well as strategic and tactical missile systems.

Cov tuam txhab Aerospace R & D thiab cov chaw tsim khoom muaj nyob hauv Beijing, Shanghai, Tianjin, Xi'an, Chengdu, Hong Kong thiab Shenzhen. Raws li lub tswv yim ntawm kev ua tub rog-kev sib koom ua ke, CASC tau txais kev saib xyuas zoo rau kev siv thev naus laus zis xws li satellite applications, cov ntaub ntawv thev naus laus zis, lub zog tshiab thiab cov khoom siv, kev siv tshuab tshwj xeeb hauv chaw, thiab chaw lom neeg lom zem.

CASC kuj tseem txhim kho qhov chaw pabcuam zoo xws li satellite thiab nws cov haujlwm hauv av, kev pabcuam kev lag luam thoob ntiaj teb, kev nqis peev nyiaj txiag hauv chaw, software thiab kev pabcuam ntaub ntawv. Tam sim no CASC yog tib tus neeg tshaj xov xwm thiab kev sib txuas lus satellite hauv Suav teb, thiab cov khoom lag luam nrog cov nplai loj tshaj plaws thiab muaj zog tshaj plaws hauv kev lag luam hauv Suav teb cov ntaub ntawv xov xwm.

Tau ntau xyoo dhau los, CASC tau ua haujlwm zoo rau lub teb chaws kev lag luam thiab kev loj hlob ntawm kev sib raug zoo, kev tiv thaiv niaj hnub hauv teb chaws thiab kev kawm txuj ci thiab kev kawm.

Tam sim no, CASC tau mob siab rau nws tus kheej los tsim Tuam Tshoj rau hauv qhov chaw muaj zog, tsis tu ncua ua lub teb chaws loj kev tshawb fawb thiab kev ua haujlwm xws li Manned Spaceflight, Lunar Exploration, Beidou Navigation thiab High-Resolution Earth Observation System; pib ib tug xov tooj ntawm tshiab loj cov kev pab cuam thiab tej yaam num xws li hnyav launching tsheb, Mars kev tshawb fawb, asteroid tshawb nrhiav, chaw tsheb nyob rau hauv-orbit kev pab cuam thiab txij nkawm, thiab chaw-hauv av integrated ntaub ntawv network; thiab nquag ua cov kev sib pauv thoob ntiaj teb thiab kev koom tes, yog li ua kom muaj txiaj ntsig tshiab rau kev siv thaj chaw sab nrauv thiab muaj txiaj ntsig zoo rau tib neeg.

10. Northrop Grumman

Los ntawm cov tsheb tsis muaj neeg tsav dav hlau mus rau cov neeg hlau uas muaj kev phom sij, kev tua tsiaj hauv qab dej thiab cov phiaj xwm kev tiv thaiv kev tiv thaiv, Northrop Grumman yog tus thawj coj lees paub hauv cov txheej txheem tswj hwm tus kheej, pab cov neeg siv khoom ua tau raws ntau txoj haujlwm thoob plaws hiav txwv, huab cua, av thiab chaw.

• Net Muag: $ 34 Billion

Aeronautical tuam txhab uas muag Los ntawm fuselage qhov chaw mus rau lub cav Cheebtsam, Northrop Grumman lub teeb yuag, high-strength composite cov ntaub ntawv yog txo qhov hnyav, kev txhim kho kev ua tau zoo thiab txo tus nqi lifecycle ntawm kev lag luam dav hlau.

Northrop Grumman lub peev xwm hauv kev ua tsov rog hauv hluav taws xob kis tau txhua qhov chaw - av, hiav txwv, huab cua, chaw, cyberspace thiab electromagnetic spectrum. Ntawm cov npe ntawm 10 Qhov Zoo Tshaj Plaws Aerospace Manufacturing Companies.

Txij li thaum pib, Northrop Grumman tau ua tus pioneer hauv kev txhim kho cov neeg tsav dav hlau. Los ntawm cov dav hlau fighter thiab stealth bombers mus soj ntsuam thiab hluav taws xob ua tsov ua rog, Lub tuam txhab tau muab manned kev daws teeb meem rau cov neeg muas zaub thoob ntiaj teb txij li thaum 1930s.

Yog li thaum kawg cov no yog cov npe ntawm 10 lub tuam txhab dav hlau loj tshaj plaws hauv ntiaj teb.