用“hard metal alloy”造句大全，hard metal alloy造句
We must first clear of the old line, when constructed line, motor drive the cutter made of hard metal alloy to revolve at high speed, then erase old line.
renewed technology of hard metal alloy mould
The technology of developing quality and strong pick is found by researching the hard metal alloy, pick-body material, weld gap, technique of braze welding and heat treatment.
