2813| 2
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材料60Si2Mn線徑1.0和0.7的彈簧能在250度高溫下正常工作嗎?---請教 |
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回復 2# 貓貓不吃糧 的帖子
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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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