Bedeutungen
[die] 工作面。作用面。（轮子）滚动面。（轮胎）着地面。（轨道）滑动面。摩擦面。（滚珠轴承）滚道。
tread, running surface, wearing surface, bearing surface, sliding surface, working surface
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[die] 滚动面，工作面，胎面

Substantiv, f