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根据1973年9月基础标准讨论会及部(73)三科1148号文的精神,由黎明机械厂、松陵机械厂和东安机械厂组成了部标准《普通螺纹》HB 241-70修订组。修订组经过重点调查研究,先后编写了讨论一稿和二稿,在广泛征求意见的基础上完成了报审稿。一九七五年五月二十五日召开的部标准审定会上审查通过了该项标准。现已经部批准正式颁发,标准编号为HB241—75。现将本标准在修订中的有关问题说明如下:
According to the spirit of the September 1973 Basic Standards Seminar and the Department (73) Three Sections No. 1148, the Liming Machinery Plant, Songling Machinery Plant, and Dong’an Machinery Plant formed the “Standard Thread” HB 241-70 revision group. The revision team has focused on investigations and studies and has successively drafted the first and second drafts of the discussion, and completed the draft for review on the basis of extensive solicitation of opinions. The standards review meeting was held on May 25, 1975. It has been officially approved by the Ministry. The standard number is HB241-75. The relevant issues in the revision of this standard are now described as follows: