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Cov ntawv pov thawj thiab Cov ntawv xeem

LYD tempered iav tau dhau EN-12150 tus qauv (EU tempered iav tus qauv) thiab CAN CGSB 12.1-M90 tus qauv (Canadian tempered iav txheem), ANSI Z97.1 thiab 16 CFR 1201-II (American tempered iav txheem)

Daim ntawv pov thawj thiab ntawv qhia zaub

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