كتب في التلحيم

http://www.4shared.com/file/77753489/efc43fb4/welding_metallurgy_theory_G11_P2.html




http://www.4shared.com/file/76015248/5b62fe8c/wel1.html

http://www.4shared.com/file/76015249/2c65ce1a/wel2.html



http://www.4shared.com/file/77753490/8f03b651/welding_metallurgy_G11_applied.html

http://www.4shared.com/file/77753361/7ad38c8d/welding_metallurgy_G11.html