Jewellery ; fineness of precious metal alloys iso 9202 : 1991 ; german version en 29202 : 1992 珠宝.贵重金属合金的钝度
2.
Bit - tooth dullness 钻头牙齿磨钝度
3.
Earth - moving machinery - operator station and maintenance areas - bluntness of edges 土方机械.操作人员工作站和维修区域.边缘部位的钝度
4.
Safety of earth - moving machinery - specification for bluntness of edges at the operator station and in maintenance areas 土方机械的安全性.操作人员工作站和维护区域里的边部钝度规范
