Thread take-up lever stroke 挑线杆行程
Thread take-up cam 挑线凸轮
Thread take-up crank 挑线曲柄
Thread take-up lever roller 挑线杆滚柱
Thread take-up lever hinge pin 挑线杆铰合销
Thread take-up lever roller stud 挑线杆滚柱轴
Thread take-up crank position screw 挑线曲柄固定螺丝
Thread take-up lever complete 凸轮式挑线杆组 ; 连杆式挑线杆组
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