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.
齿轮材料为合金钢，硬齿面，输出转矩大，可靠耐用。
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。
Alloy steel gear, hard tooth surface, large in output torque and durable in use.
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