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急救電機該如何選型 |
點評
你好好想想行不行,中間做一個活動接頭,和鋼絲繩的原理一樣。
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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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