Kev txhim kho ntawm cov xwm txheej bolts yog ze rau kev tsim kho txhua yam ntawm cov qauv kev lag luam thiab cov qauv kev tsim kho yog raws li hauv qab no:
Txij puag thaum ub mus rau nruab nrab hnub nyoog:Cov qauv ntawm bolts tuaj yeem raug xa rov qab mus rau cov khoom ntoo uas tau siv thiab siv rau hauv qhov chaw ua haujlwm hauv lub pob zeb. maj mam txais cov koob npe nrov hauv kev lag luam . Cov screads thaum ntxov} Thaum cov txiv roj presses, thiab lwm yam}
Txij xyoo 15th mus rau xyoo pua puv 19:Nyob rau hauv 15th caug xyoo, bolts pib siv hauv kev sib xyaw ua ke nrog nyiaj txiag nrog nyiaj yooj yim thiab cov neeg nyob hauv nruab nrab, tab sis lawv tseem niaj hnub siv tau ntawm kev tuav cov ntawv luam yeeb yooj yim . hauv 18th caug xyoo, kev lag luam kev hloov kho nrawm nrawm ntawm bolts {{} qhov tshwm sim ntawm cov txiaj ntsig tau tshwm sim hauv cov tshuab thiab ua haujlwm.
Txij thaum ntxov mus rau nruab nrab ntawm lub xyoo pua 20:Xyoo 1908, Canadians tsim lub square qhov ntsia hlau, uas yog "thawj lub taub hau kev tsim khoom, txhawb nqa cov screading ntawm screws thiab cov cuab yeej muaj feem cuam tshuam, thiab tsis ncaj ncees rau cov kev nthuav dav ntawm daim ntawv thov ntawm cov xwm txheej ntawm cov square bolts.
Los ntawm lub xyoo pua 20 mus rau tam sim no: Nrog rau kev lag luam muaj nyob rau hauv ntau hnub, thiab kev txhim kho ntawm cov qauv xov, txhim kho cov khoom tsim kho tau thiab cov khoom lag luam Cov ntawv sau ua ke rau cov kev xav tau rau cov khoom siv hluav taws xob tsis muaj zog, txhim kho lub ntsej muag uas tsis muaj zog, txhim kho lub ntsej muag ci ntsa iab, ua kom zoo nkauj}}}} Hauv kev thov sib txawv ntawm cov xwm txheej sib txawv .
Khoom:Customizable-Carbon-Hlau-Square-Bolt
