7885| 8
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NPT螺紋密封問題? |
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點評
慚愧,都不是。曾經學過容器。
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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