Thaum twg cov iav fwj tsis siv?
** Taw qhia
Lub raj mis iav tau ib zaug pom hauv tsev neeg thiab kev lag luam ib yam nkaus. Lawv tau siv rau ntau lub hom phiaj, suav nrog kev khaws cia cov kua, khaws cia zaub mov, thiab ntim khoom. Txawm li cas los xij, nrog rau cov khoom siv tshiab thiab thev naus laus zis, iav fwj maj mam poob tawm ntawm kev nyiam thiab tau hloov los ntawm yas, hlau, thiab lwm yam khoom siv. Hauv tsab xov xwm no, peb yuav tshawb txog keeb kwm ntawm iav fwj thiab tshuaj xyuas cov laj thawj tom qab lawv poob.
** Keeb kwm ntawm iav fwj
Kev siv iav rau khaws cov kua dej tuaj yeem taug qab mus rau lub sijhawm qub. Piv txwv li, cov neeg Iyiv tau siv cov iav raj los khaws cov tshuaj tsw qab thiab roj. Cov iav fwj raws li peb paub niaj hnub no, txawm li cas los xij, tsis tau tshwm sim txog thaum xyoo pua 17th. Thaum xub thawj, lawv tau kim thiab tshwj tseg rau cov neeg muaj nyiaj, tab sis raws li cov txheej txheem ua iav tau txhim kho, lawv tau txais txiaj ntsig ntau dua thiab siv tau rau tib neeg.
Los ntawm lub xyoo pua 19th, iav fwj tau dhau los ua txhua yam. Lawv tau siv rau ntau yam khoom, los ntawm cov tshuaj mus rau dej qab zib rau npias. Qhov tseeb, qhov nce ntawm lub raj mis dej qab zib kev lag luam tau pab txhawb lub koob npe ntawm cov iav fwj. Lub durability thiab pob tshab ntawm iav ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev tuav cov dej haus carbonated.
** Qhov poob ntawm iav fwj
Txawm hais tias lawv tau siv dav thiab muaj koob meej, cov iav fwj tau pib poob rau hauv nruab nrab -20th caug xyoo. Muaj ob peb yam uas ua rau qhov kev poob qis no. Ib qho tseem ceeb tshaj plaws yog qhov nce ntawm cov yas.
Lub raj mis yas tau tshwm sim thawj zaug hauv xyoo 1940, tab sis nws tsis yog txog thaum xyoo 1960 uas lawv pib tau txais kev lees paub thoob plaws. Lub raj mis yas muaj ntau qhov zoo dua li cov iav fwj. Lawv tau sib dua, pheej yig dua, thiab tsis tshua tawg. Tsis tas li ntawd, cov yas tuaj yeem ua rau ntau yam duab thiab qhov ntau thiab tsawg, ua kom muaj ntau yam ntau dua li iav.
Lwm qhov tseem ceeb uas ua rau txo qis ntawm cov iav fwj yog qhov nce hauv kev paub txog ib puag ncig. Cov iav fwj yog cov khoom siv rov ua dua tshiab, tab sis lawv xav tau ntau lub zog los tsim thiab thauj. Raws li cov neeg siv khoom txhawj xeeb txog lawv qhov cuam tshuam rau ib puag ncig, lub raj mis yas pib tau txais kev pom zoo. Yas yog sib dua thiab yooj yim rau kev thauj mus los, uas txo cov pa roj carbon hneev taw ntawm cov txheej txheem shipping.
** Lub neej yav tom ntej ntawm iav fwj
Txawm hais tias lawv poob qis, iav fwj tsis yog siv tag nrho. Tseem muaj qee yam khoom uas feem ntau ntim rau hauv iav, xws li cawv txiv hmab thiab khoom siv tes ua npias. Tsis tas li ntawd, muaj kev txaus siab rau kev ruaj khov thiab txo cov khoom pov tseg, uas tuaj yeem ua rau muaj kev rov ua dua tshiab ntawm kev siv cov iav fwj.
Ib cheeb tsam uas cov iav fwj tuaj yeem ua rau rov qab los yog hauv kev lag luam tshuaj pleev ib ce. Cov iav fwj feem ntau yog siv rau cov khoom siv tawv nqaij zoo thiab cov tshuaj tsw qab. Cov khoom no feem ntau yog muag hauv cov khoom me me thiab ntawm tus nqi siab dua, uas ua rau iav qhov kev xaiv zoo dua li cov yas.
Lwm lub peev xwm siv tau rau cov iav fwj yog nyob rau hauv ntim khoom noj khoom haus thiab dej haus. Cov iav fwj muaj qhov zoo saib thiab xav tias muaj feem xyuam nrog cov khoom zoo. Raws li cov neeg siv khoom tau paub ntau ntxiv txog qhov zoo ntawm cov khoom noj thiab dej haus uas lawv haus, iav fwj tuaj yeem yog qhov kev xaiv nrov.
** Lus xaus
Hauv kev xaus, iav fwj yog ib qho tseem ceeb ntawm tsev neeg thiab kev lag luam thoob ntiaj teb. Txawm li cas los xij, nrog kev nce ntawm cov yas thiab kev nce hauv ib puag ncig kev paub, iav fwj tau poob rau hauv qhov chaw. Txawm hais tias qhov kev poob qis no, tseem muaj qee qhov kev lag luam uas iav yog cov khoom nyiam, thiab muaj kev txaus siab rau kev ruaj khov thiab txo cov khoom pov tseg uas tuaj yeem ua rau muaj kev rov tshwm sim ntawm kev siv cov iav fwj. Tsuas yog lub sijhawm yuav qhia tias yav tom ntej muaj dab tsi rau lub cim ntim khoom no.