The cutting tool material is best used hard alloy.
刀具材料最好采用硬质合金。
Alloy steel gear, hard tooth surface, large in output torque and durable in use.
齿轮材料为合金钢，硬齿面，输出转矩大，可靠耐用。
Seal the surface material: Structure pottery or exceeding two kinds alloy materials of hard surface.
密封面材料：结构陶瓷或超硬表面合金材料二种。
Seal the surface material: Structure pottery or exceeding two kinds alloy materials of hard surface.
密封面材料：结构陶瓷或超硬表面合金材料二种。
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