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履带式掘进机的行走装置及液压系统设计+约2.6w字说明书+11张CAD

X62W-526A拨叉加工工艺及粗镗拨叉脚内表面夹具设计【中心距145.5】

重力式油气水三相分离器结构设计+约1.6w字说明书+8张CAD+答辩PPT