2830| 7
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誰見過這樣的卡環(huán),?有規(guī)格表嗎,? |
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點(diǎn)評
活塞環(huán)的接口是互補(bǔ)的,就是缺口方向能互相補(bǔ)全,,這個是對稱的,,不應(yīng)該是活塞環(huán)
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