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Book Description paperback. Condition: New. Paperback Pages Number: 221 Language: Chinese. Identification of gas welders skills assessment item bank is prepared for gas welders skills accreditation bodies. self-test work training department out of the question and gas welders. and mechanics vocational skills training materials gas welder technology supporting item bank. According to early. high-level organized in the order. each level is divided into the knowledge required for questions and skills requirements questions in two parts. t. Seller Inventory # MX7433