4 0
Engineering drawing and graphic technology / 6 6 C.B. Firth, A. W. Vander Willigen. - - - ix, 197p. : illus.,. - - - - - . - . - 0 . - . - 0 .
5
5
2 = =
2
2 --0------
6 --0-- 2 --------
0 2 --
--20------
--------20--
--------20--
----2
/ 2
/ 2
/
/
Engineering drawing and graphic technology / 6 6 C.B. Firth, A. W. Vander Willigen. - - - ix, 197p. : illus.,. - - - - - . - . - 0 . - . - 0 .
5
5
2 = =
2
2 --0------
6 --0-- 2 --------
0 2 --
--20------
--------20--
--------20--
----2
/ 2
/ 2
/
/