SRI LANKA STANDARD 409 : 1977 Specification for Engineering Drawing Practice : Pt. I - general principles : Pt. 2 - dimensioning & tolerancing of size : Pt. 3 - geometrical tolerencing
- Colombo SLS Institution 1977
- various paging
a744:621.71
SRI LANKA-STANDARDS
STANDARDS-SRI LANKA
ENGINEERING DRAWING
a744:621.71
SRI LANKA-STANDARDS
STANDARDS-SRI LANKA
ENGINEERING DRAWING