Welding is an extremely strict modern manufacturing technique, and the welder must undergo a rigorous evaluation and take appointment with certificate. Assessors must strictly enforce the evaluation systems and standards on the basis of constantly improving their own quality.%焊接是一项极为严格的现代制造技术,焊工必须经过严格考评并持证上岗。考评员必须在不断提高自身素质基础上严格执行考评制度和标准。
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