8639| 12
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槽鋼能用來(lái)做軌道嗎 |
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(chē)
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