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液压气动元件是机械工业的一种通用基础元件,而液压气动技术已发展成为现代基础技术之一,在国民经济各部门中得到了极为广泛的应用。它的标准化具有重要意义。十年动乱前只有一项国标《液压系统图图形精号》(GB786—65)(现已为《液压及气动图形符号》(GB786—76)代替)。从1980年到1981年二年间虽然制订并公布了十五项液压气动国标,但远不能满足实际工作需要。国际标准化组织第一百三十一技术委员会(TC131)——液压气动技术委员会,已制订了三十九项国际标准,正进行的标准项
Hydraulic pneumatic components are a universal basic component of the mechanical industry, and hydraulic pneumatic technology has developed into one of the modern basic technologies and has been widely used in all sectors of the national economy. Its standardization is of great importance. Before the turmoil of ten years, there was only one national standard “hydraulic system diagram figure fine” (GB786-65) (now “hydraulic and pneumatic graphical symbols” (GB786-76) instead). Although there were 15 national standards of hydraulic pneumatic developed and published between 1980 and 1981, it is far from meeting the needs of actual work. The 131st International Technical Committee (TC131) - Hydraulic and Pneumatic Technical Committee has developed 39 international standards, the ongoing standard items