"helsel, jay d. "
workbook for mechanical drawing: cad-communications/ jay.d. helsel - 11 ed. - new york : glencoe 1990. - ", 0p.; 28 cm."
0-07-022338-6
mechanical drawing--
604. 2 hel
workbook for mechanical drawing: cad-communications/ jay.d. helsel - 11 ed. - new york : glencoe 1990. - ", 0p.; 28 cm."
0-07-022338-6
mechanical drawing--
604. 2 hel