Xov xwm kev lag luam
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National fastener cov kws tshaj lij kev lag luam tuaj xyuas thiab qhia
Thaum Lub Kaum Ob Hlis 2020, lub rooj sib tham thib rau plaub xyoos ntawm National Fastener Standardization Technical Committee tau tuav hauv Handan City, Hebei Xeev.Ntau tshaj 200 tus neeg sawv cev tuaj koom lub rooj sib tham txhua xyoo, suav nrog ntau tus kws tshaj lij hauv kev lag luam fastener los ntawm thoob plaws t ...Nyeem ntxiv
