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石油套管螺紋編程時為保證中徑的配合間隙應(yīng)注意些什么? |
小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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