The rotating contacts are made with copper or silver sheet and have rectangular shape glued on the wheel.
旋转接触与铜或银板，并有长方形胶结对车轮。
Stainless steel sheet with polished surface processed with fiber emery wheel.
用纤维砂轮加工的不锈钢板材的表面。
The workability is good, the superhard body adopts the bar form or sheet form, the sharpening is convenient and quick, and the loss of the grinding wheel is low.
可加工性好，超硬体可采用条状或片状，刃磨方便快捷，砂轮损耗低。
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