我们设计和生产一台泵需要参考选用的标准,一般达300个以上,其中直接被产品设计图样上选用的各类标准约占2/3以上,并且绝大部分均是1981年以后制定发布的。从泵行业来说,由于全国生产的企业、设计研究单位不断增多和从事泵技术人员队 We design and produce a pump need to refer to the selection of the standard, generally up to 300 or more, which is directly on the design of the product selected by the various types of standards account for about 2/3 or more, and most of them are issued after 1981 . From the pump industry, due to the national production of enterprises, design and research unit is constantly increasing and in the pump technician team