标 准 编 号:DIN 905-2009简体中文标题:螺钉和螺母装配工具.T形扳手,内四方扳手.技术规范繁体中文标题:螺钉和螺母装配工具.T形扳手,内四方扳手.技术规范English Name:Assembly tools for screws and nuts - Tee wrenches, male square - Technical specifications