细牙全螺纹六角头螺栓 A级和B级
Hexagon Head Screws, With Fine Pitch Thread - Product Grades A And B
六角头螺栓 细牙 全螺纹
Hexagon Head Screws With Metric Fine Pitch Thread-Product Grades A And B
细牙六角头螺栓
Hexagon head screws with metric fine pitch thread-Product grades A and B