925e jewelry wholesale What does z to express the national industry standard code? For example, what does Z? Such as CHZ unfolding
1 thought on “925e jewelry wholesale What does z to express the national industry standard code? Such as CHZ”
Leave a Comment
You must be logged in to post a comment.
au jewelry wholesale You should be CH/Z, CH is the standard released by the National Surveying and Mapping Administration, Z refers to the guiding technical documents. According to the "National Standardization Guiding Technical Documents Management Regulations"
Them
The code of guiding technical files is composed of the capital Pinyin letter "GB / Z".
The number of guidance technical files consists of the codes, sequence and year number of guidance technology files (that is, four digits of the year):
Formulate, in accordance with the relevant provisions of the "National Standards Management Measures" and GB / T
16733 "Phase Division and Code of the National Standard Formulation Procedure".
The guidance technical document projects are included in the "National Standard System, Revised Project Plan", and in the "National Standard System, Revised Project Plan" and other relevant documents, "GB / Z" is indicated.