| http://www.w3.org/ns/prov#value | - (C) Blueprint reading, layout and shop mathematics; (D) Interpreting plans and specifications covering installation, alteration, repair, fabrication and erection of boilers and pressure vessels; (E) Welding process, metallurgy and other procedures particularly applicable to boilers and pressure vessels; and (F) The State of Oregon Boiler Safety Program Study Guide. (c) Class 4 Boilermakers may als
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