CSN 25 4069-1986 Screw gauges Wear check plug for solid or adjustable NOT GO screw ring gauge Cylindrical pipe thread diameter G 1 8 - G 3 1 2《螺纹规 非穿过型实心可调节环形耐磨量规的检查插塞，圆柱形导管螺纹，直径1 .pdf

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