7486| 12
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槽鋼能用來(lái)做軌道嗎 |
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點(diǎn)評(píng)
好的,,謝謝
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點(diǎn)評(píng)
好的,,謝謝
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點(diǎn)評(píng)
在要求不高的短行程上,,比如100mm,,是沒(méi)有問(wèn)題的。
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點(diǎn)評(píng)
滾動(dòng)摩擦,,軌道上走四輪小車
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