8660| 13
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選軸承配合公差求解 |
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點(diǎn)評(píng)
地球就是地面,相對地面,一般機(jī)械都是固定副加運(yùn)動(dòng)副組成,機(jī)架一般是固定不動(dòng),沒有指明坐標(biāo)系和相對關(guān)系就是以地球作為坐標(biāo)系
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