广东11选5

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挖掘機軸承滾珠

2017-09-25 09:50:12

從所有關鍵因素的嚴格測試開始,挖掘機軸承滾珠是在專用機器上生產的,熱處理是最重要的操作之一,它給滾珠提供了所需的強度和硬度。熱處理使球堅韌而耐磨。

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