3205| 10
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金屬齒輪和非金屬齒輪嚙合需要潤(rùn)滑嗎 |
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點(diǎn)評(píng)
1400轉(zhuǎn)難道一級(jí)就用了,。
塑料齒輪又不是隨便用的,,樓主先說(shuō)說(shuō)為啥選塑料材質(zhì)再說(shuō)^_^
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