Blacken ASTM1980 G30 Tsheb thauj mus los saw

Peb tshwj xeeb hauv kev tsim cov saw hlau rau 20 xyoo. Raws li cov kws tshaj lij kev tsim khoom, peb cov khoom lag luam muaj ntau yam, xws li cov saw ntsuas siab ASTM80, G120 saw, G100 saw, G80 saw, NACM1990 series, DIN5685, DIN763, DIN764, DIN766, zoo lifting saw, thiab lwm yam.

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