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to phrases
track bolt
auto. 履带式车辆履带板销
met. 轨条螺栓
tech. 线路螺栓; 轨道螺栓; 路轨接缝板螺栓; 接头螺栓; 钢轨接头的夹板螺栓
track bolt: 2 phrases in 2 subjects
Rail transport1
Technology1