slip stone
... 滑移速率 slip speed 修磨石 slip stone 冲流，滑流 slip stream ...
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烧蚀或氧化的部分可磨修，用细锉刀或细磨石小心清除。
Points that are Burned or oxidized can be cleaned with a thin, fine-cut contact file or stone.
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Points that are Burned or oxidized can be cleaned with a thin, fine -cut contact file or...
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