名词
中文翻译：倒退焊接
同义词：
['backward welding', 'backward soldering']
例句：
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1.The engineers were working on a project that required backward welding techniques.
工程师们正在研究一个需要倒退焊接技术的项目。
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2.The old car was in need of some backward welding to fix its engine.
这辆旧车需要一些倒退焊接来修理它的引擎。
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3. The technicians used backward welding to repair the damaged parts of the machine.
技术人员使用倒退焊接来修复机器的损坏部分。