细牙六角头螺栓 A级和B级
Hexagon Head Bolts with Fine Pitch Thread - Product Grades A and B
细牙六角头螺栓 A级和B级
Hexagon Head Bolts with Metric Fine Pitch Thread - Product Grades A and B
细牙螺纹六角头螺栓.产品等级A和B级
Hexagon Head Bolts with Metric Fine Pitch Thread - Product Grades A and B