7436| 18
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誰能告訴這個齒輪的齒數是多少 |
點評
這位前輩話雖然直了點,但很中肯,很多事情看一眼,再自己思考一下就明白了,用點心吧
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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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