Geometrical product specifications (GPS) - GO workshop screw plug gauges and check plugs for ISO metric screw threads with nominal diameters over 40 mm up to 250 mm, for use in precision engineering
产品几何技术规范(GPS)-“GO”螺纹塞规.第3部分:精密机械用公称直径大于40mm至250mm的ISO公制螺纹的“GO”车间塞规和止回塞规