[yuantaiderun] steel kauv hauv av pawg tuaj yeem tsim los ntawm kev txiav txim, nrog lub peev xwm ntawm ntau tshaj 20000 daim hauv ib hnub, tuaj yeem dai thiab plated, thiab qhov nruab nrab zinc txheej yog 75-100um.Cov khoom lag luam tag nrho cov txheej txheem kev tswj hwm, kev ua haujlwm zoo, lub sijhawm tsim kho sai thiab qis ...
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