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Keeb kwm ntawm galvanizing
los ntawm Admin nyob rau hauv 22-07-29
Xyoo 1836, Sorel hauv Fab Kis tau coj tawm thawj zaug ntawm ntau patents rau txheej txheem txheej hlau los ntawm dipping nws hauv molten Zinc tom qab thawj zaug ntxuav nws.Nws muab cov txheej txheem nrog nws lub npe 'galvanizing'.Keeb kwm ntawm galvanizing pib tshaj 300 xyoo dhau los, thaum ib tug alchemist-los-chemist npau suav txog ...
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