2939| 4
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水下10m左右 中空的球體和圓柱 壁厚應該設計多厚能抗水壓 |
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點評
1公斤壓力,1.5mm以上
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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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