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Familiar with welding process, standard and materials.
熟悉焊接流程，标准和材料。
youdao
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It is difficult to ensure quality when welding different materials.
异种材料焊接时焊接质量较难保证。
youdao
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It is difficult to ensure quality when welding different materials.
异种材料焊接时焊接质量较难保证。
youdao