
Technical Drawings - General Principles Of Presentation - Part 21: Preparation Of Lines By Cad Systems
出版:British Standards Institution

專家解讀視頻
Defines procedures for calculating important basic types of non-continuous lines and their line elements. (see ISO 128-20).
? British Standards Institution 2013
Renumbered and superseded by BS EN ISO 128-21.
Supersedes BS 308-1(1993), BS 308-2(1985) & BS 308-3(1990).
(01/2006)
ISO 128-21:1997 - Identical