CSN 25 4174-1963 Measuring parts of NOT GO limits of cylindrical thread gauges Cylindrical pipe thread Diameter G 1 8 - G 3 1 2 《非穿过型 圆柱型螺纹规限制的测量部件 圆柱形导管螺纹 G 1 8 - O 3 1 2 直径》.pdf

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