5429| 6
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四個車輪都是單輪緣的,軌道頭內側面間距應該比兩側輪緣間距大幾毫米合適? |
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請問什么手冊上有?
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點評
謝謝
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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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