pressure vacuum pump vacuum pressure pump
压力真空泵
以上为机器翻译结果,长、整句建议使用 人工翻译 。
Connect the vacuum pump to the compound pressure gauge; open the compound pressure gauge and vacuum pump to vacuum the indoor unit and connecting pipe.
将真空泵连于复合压力表,打开复合压力表和真空泵对室内机和连接管抽真空。
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