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如何保证焊接质量，是本工程的关键。
How to ensure the welding quality is the key to this project.
youdao
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异种材料焊接时焊接质量较难保证。
It is difficult to ensure quality when welding different materials.
youdao
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异种材料焊接时焊接质量较难保证。
It is difficult to ensure quality when welding different materials.
youdao