1CS21.040.10J42中华人民共和国国家标准GB/T10922-2006代替GB/T10922一198955非密封管螺纹量规Gauges for pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads(ISO 228-2:1987,Pipe threads where pressure-tight joints are not madeon the threads-Part 2:Verification by means of limit gauges,MOD)2006-02-05发布2006-08-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会
