NF E 25-522 - 1999 标準型組合墊圈 用于自攻螺釘和墊圈組合件 Plain Washers For Tapping Screw And Washer Assemblies - Normal Series - Product Grade A 供應商(1) [法國] NF E 25-514 - 1987 A級平墊圈 Plain Washers - Product Grade A