Why does graphic symbol of active hydraulic pressure pneumatic carry out our cou

World each country has level of his graphic symbol of hydraulic pressure pneumatic. The standard that our country implements at present is GB/T 786. 1-1993 " graphic symbol of hydraulic pressure pneumatic " , this standard provided hydraulic pressure, graphic symbol of pneumatic component standard and scale method. In hydraulic pressure technology, answer to implement this one standard strictly.
Our country heretofore parts 1965, mixed 1976 issued standard of graphic symbol of hydraulic pressure pneumatic 3 times early or late 1993. Active GB/T786.1-1993 is referenced on the foundation of GB/T786-1976 " ISO1219-1: 1991Fluidbols " edit and become. GB/T786. The content of real skill sex of 1-1993 and international standard are basic and same, it is thereby communicate and communicate in domain of hydraulic pressure, pneumatic with world each country offerred convenient.