空气分离设备流程图 图形符号和文字代号
Flow chart of air separation plant—Graphical symbols and letter codes
2018-07-13
UNE-EN 1861-1999
REFRIGERATING SYSTEMS AND HEAT PUMPS. SYSTEM FLOW DIAGRAMS AND PIPING AND INSTRUMENT DIAGRAMS. LAYOUT AND SYMBOLS.
制冷系统和热泵 系统流程图、管道和仪表图 布局和符号
1999-03-31
BS EN 1861-1998
Refrigerating systems and heat pumps. System flow diagrams and piping and instrument diagrams. Layout and symbols
制冷系统和热泵 系统流程图、管道和仪表图 布局和符号
1998-12-15
EN 1861-1998
Refrigerating systems and heat pumps - System flow diagrams and piping and instrument diagrams - Layout and symbols
制冷系统和热泵 - 系统流程图和管道和仪表图 - 布局和符号
1998-04-22
DIN EN 1861
Refrigerating systems and heat pumps - System flow diagrams and piping instrument diagrams - Layout and symbols
制冷系统和热泵-系统流程图、管道和仪表图-布局和符号；德文版EN 1861:1998