drawbench造句

The pic is not clear, but it feels like drawbench silver work.
图还是看不清, 但感觉是拉丝银工艺.

Cold working strain phosphating includes drawbench phosphating, cold extrusion phosphating and cold stamping phosphating.
冷加变形磷化主要包括拉丝磷化、冷挤磷化、冷冲磷化.