thawj zaug txiav Galvanized Nails tshuab tau tshwm sim thaum lub sijhawm lig 1700's thiab thawj lub tshuab txiav thiab taub hau Galvanized Nails hauv ib lub lag luam tau tsim los ntawm Ezekiel Reed ntawm Bridgewater, Mass. Tam sim no Galvanized Nails Hoobkas muaj txog 60 Galvanized Nails tshuab thiab tau ua tiav xyoo 1848.
Thaum twg cov ntsia hlau tau pib siv?
Tom qab cov txheej txheem ua hlau tau ua tiav thiab tus nqi rau cov hlau tsawg dua li cov hlau wrought, txiav ntsia hlau manufacturers pib siv hlau rau cov rau tes. Los ntawm lig 1880s txog rau 1890s steel maj mam hloov wrought hlau hauv kev tsim cov ntsia hlau txiav (Heitmann 1989: 30).
Koj tuaj yeem qhia tau tias koj cov ntsia hlau muaj hnub nyoog li cas?
Cov ntsia hlau ua ntej tshaj plaws tau txheeb xyuas los ntawm lawv cov shanks tsis tu ncua thiab rauj cov cim ntawm ob lub shanks thiab taub hauThaum saib los ntawm saum toj no, lub taub hau puag ncig thaum ntxov muaj lub ntsiab lus uas yog txhua yam tab sis puag ncig.. Tom qab lub tshuab txiav shanks tseem yuav pom hammering uas tsim nyog los ua lub taub hau.
xyoo twg lawv tso tseg cov ntsia hlau?
Txog kwv yees 1800, cov ntsia hlau tau xuas tes ua - tapered square shafts thiab tes-hammered hau. Thaum lub sijhawm xyoo 1800, cov ntsia hlau txiav tau tapered rectangular shafts thiab rectangular hau. Nyob rau xyoo 1900, cov ntsia hlau puag ncig nrog rau sab ncaj thiab lub taub hau puag ncig yog tus qauv.
Vim li cas ib co ntsia hlau galvanized?
Vim li cas siv cov ntsia hlau galvanized? Cov lus teb ceev ceev, kom qeeb cov txheej txheem ntawm xeb thiab xeb, los ntawm kev tiv thaiv tus ntsia thawv nrog zinc txheej.