标 准 编 号:BS ISO 4229-2009 简体中文标题:螺钉和螺母用装配工具.较低扭转力应用的单头扳手.前端和测试扭矩外形尺寸最大值 繁体中文标题:螺钉和螺母用装配工具.较低扭转力应用的单头扳手.前端和测试扭矩外形尺寸最大值 English Name:Assembly tools for screws and nuts - Single-head engineer's wrenches for lower torque applications - Maximum outside dimensions of heads and test torques