短语词组短语balance spring stud screw 游丝外栓螺钉hairspring stud screw 游丝外桩螺钉balance ring stud screw 游丝外栓螺钉balance e spring stud screw 游丝外栓螺钉Screw stud 双头螺栓;无头螺桩;螺柱tension screw stud 夹线螺钉 返回 stud screw