关面的标志符号 meaning in English
symbolic designation of direction of opening and closing and faces of doors and windows
Examples
- Symbolic designation of direction of opening and closing and faces of doors and windows
建筑门窗扇开关方向和开关面的标志符号 - Gb t 58251986 construction window - door : opening and closing the direction signs and symbols
Gb t 58251986建筑门窗扇开关方向和开关面的标志符号