Lub galvanized txheej yog metallurgically sib khi rau cov hlau thiab dhau los ua ib feem ntawm cov npoo ntawm cov hlau, yog li lub durability ntawm txheej yog ntau txhim khu kev qha.
5.3. Cov txheej txheej tau sib raug zoo rau lub substrate
Oct 20, 2025
Xa kev nug
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