abstract code
5.Abstract: To solve the problems in code design of information system development such as deviate standard, unreasonable structure, and incomplete contents, this paper puts forward concrete processing suggestion as follows: Code design must (1) strictly conform to the national standard (GB series); (2)not only fully consider its extendibility and reasonability, but also its simplification and stability ; (3)have code verification for any codes used in the information system development.
7.Abstract “technical condition of wrapping gasket”, Britain BS code, Germany DIN code, Japanese JIS code and US API code in application range, gasket type and technical condition are discussed . It is considered that the difference of wrapping gasket in application range is quite little for domestic and abroad standard and the type of gasket is all coincident.

