英语词汇“protective gas”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	protective gas
释义	protective gas 基本例句保护气体 The PQR shall include the composition and flow rate of the shielding and inert gas backing, when used.焊接工艺评定记录单上应包括封底焊时所用的惰性保护气体组成成分和流率。
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