SLS 690 : pt 1 : 1985 : Graphical symbols used in electrotechnology, pt.1 - Architectural and installations diagrams.
- Colombo SLSI 1985
- 13 p.
STD2875
SLS 690
a003.62:621.3
SRI LANKA-STANDARDS
STANDARDS-SRI LANKA
STD2875
SLS 690
a003.62:621.3
SRI LANKA-STANDARDS
STANDARDS-SRI LANKA