| | American Design Drafting Association
http://www.adda.org
| |
| | DRAFTING STANDARDS
http://idsdev.mccneb.edu/djackson/default.htm
| |
| | JOurney Ed Software
http://www.journeyed.com/department.asp?NAV=01
| |
| | National Institute of Metalworking Skills
http://www.nims-skills.org
| |
| | Welding Guide
http://www.metalwebnews.com/howto/weld/weld.html
| |