Thaum nws los txog rau kev tiv thaiv peb tus kheej ntawm cov huab cua, tsis muaj ob peb yam khoom tsim tau uas tau sawv ntawm qhov kev sim ntawm lub sijhawm zoo li lub kaus. Tau ntau pua xyoo, lub cuab yeej yooj yim no tau tiv thaiv peb ntawm nag, daus, thiab hnub, muab qhov chaw nyab xeeb rau peb tiv thaiv xwm txheej. Tab sis tom qab qhov yooj yim ntawm lub kaus yog lub ntiaj teb zoo kawg nkaus ntawm kev tsim kho thiab kev tsim qauv, tshwj xeeb tshaj yog thaum nws los txog rau lub thav duab. Hauv tsab xov xwm no, peb yuav tshawb nrhiav kev kos duab ntawm kev tsim cov thav duab kaus yooj ywm, cov thev naus laus zis tom qab lawv, thiab qhov cuam tshuam uas lawv muaj rau peb lub neej txhua hnub.
Kev Hloov Pauv ntawm Cov Ncej Umbrella
Cov kaus mom muaj keeb kwm ntev thiab muaj dab neeg, hnub rov qab mus rau ntau txhiab xyoo rau cov neeg thaum ub xws li Mesopotamia, Egypt, thiab Suav teb. Txawm li cas los xij, nws tsis yog txog rau xyoo pua 18th uas lub kaus mom niaj hnub no, raws li peb paub nws niaj hnub no, pib tsim. Kev txhim kho ntawm cov thav duab kaus mom tau los ntev txij li thaum ntawd los, hloov pauv los ntawm cov qauv khov kho thiab nyuaj rau cov qauv tsim sib dua thiab yoog tau.
Lub hom phiaj tseem ceeb ntawm txhua lub thav duab kaus yog txhawb nqa lub ru tsev thiab ua kom nws nruj, muab lub tiv thaiv ruaj khov tiv thaiv cov huab cua. Txawm li cas los xij, kev ywj pheej tau dhau los ua qhov tseem ceeb hauv kev tsim lub kaus, tshwj xeeb tshaj yog thaum peb ntsib huab cua tsis paub tseeb thiab cua hlob. Cov thav duab kaus ib txwm ua los ntawm ntoo lossis hlau feem ntau tsis muaj peev xwm khoov thiab khoov, ua rau lawv yooj yim rau kev puas tsuaj hauv cua hlob lossis nag hnyav.
Cov Khoom Siv
Ib qho ntawm cov yam tseem ceeb hauv kev tsim cov thav duab ntawm lub kaus mom uas yoog tau yog kev xaiv cov ntaub ntawv. Cov kaus mom niaj hnub no feem ntau siv cov ntaub ntawv xws li fiberglass, txhuas, thiab carbon fiber rau lawv cov thav duab. Cov ntaub ntawv no muab kev sib xyaw ua ke zoo tshaj plaws ntawm lub zog thiab kev yoog tau.
Piv txwv li, fiberglass yog ib qho kev xaiv nrov vim nws qhov sib dua thiab yooj ywm heev. Thaum raug quab yuam, fiberglass tuaj yeem khoov thiab nqus lub zog yam tsis tawg, ua rau nws yog ib qho kev xaiv zoo heev rau cov tav ntawm lub kaus. Aluminium thiab carbon fiber kuj tseem muaj nqis rau lawv cov khoom sib dua thiab muaj peev xwm tiv taus kev khoov yam tsis muaj kev hloov pauv mus tas li.
Lub sijhawm tshaj tawm: Cuaj hlis-18-2023