In China, according to the ;standard adaptation field and hiệu quả range, it is dived into ba levels& nbsp ;: national standard, ministry standard ( professional standard ) and enterprise ;standard.
( 1 ) Quốc gia standards The national standards are công thức% 26nbsp;by the tổ chức recognized by the national standardization aggency, and approved ;ăng% 26nbsp;issued by the national chuẩn hóa aggency. Unified implementation of standards throughout ;the ;country. Chủ yếu bao gồm : basic raw vật liệu, vật liệu tiêu chuẩn ; industrial% 26nbsp;and agicultural product standards ; safety, health and environmental standards ;% 26nbsp;basic standards red to mutual cooper and general kỹ thuật ngôn ngữ ;&nb sp;chung% 26nbsp;parts, thành phần, thành phần, devices, accessories and tools, gauge standard % 3b general test and inspection method standard ; international standards that are%2 6nbsp% 3badopted and eequivalently adopted. The code of the national standard is '& nbsp ;GB ' ( that is, the first letter of the national % 3bstandard hai ký tự Tiếng Trung pinyin, and the number is expressed by serial number% 26nbsp;plus year number. For example, GB / T12707-91 said : ;No.12707 national standard, released in 1991.
( 2 ) The do bộ ban hành ( professional ) standards are approved and issued by the competent % 3b bộ , hoa hồng ( bureaus ), and unified standards within the scope of the department. It chủ yếu bao gồm : the main product standards in&n bsp% 3bthis product ; general parts, thành phần and accessories standards in this product% 26nbsp;; the standards of eequipment, tooling, tools and special raw materials % 26nbsp;in the products of this bộ phận ; điển hình process standards within % 3bthe% 26nbsp;scope of this part ; basic standards such as terms, symbols,% 26nbsp;rules and methods commonly used in the professional field ; the %3 btest% 26nbsp;and inspection method standard of some products in this product.
( 3 ) Enterprise standards ;are approved and issued by enterprises ( institutions ) or their superior.% 26nbsp;The main contents include : there is no national standard and depart %% 26nbsp;( professional ) standard product standard ; in order to improve % 3bproduct quality, enterprises công thức product standards with performance indicators higher than national % 3bstandards and bộ phận standards. Purchase or selection of raw materials standards %3 b ;purchase or selection and tự tạo tools, đo tools, standards, etc. % 3bIn principle, enterprise standards are công thức by the enterprise itself and app lưu động % 3bby the person in charge of the enterprise. Tuy nhiên, as the product ;standard of commodity delivery conditions, it needs to be approved by %3 bthe ;superior competent unit. Once the standard is issued, it is a Technical% 26nbsp;regulation. All levels of sản xuất, xây dựng, scientific research, design management phòng ban and enterprises, institutions, must be strictly implemented, any unit shall % 3bnot change or ender the standard.
