... 真空压条机：vacuum plodder 真空压力计管：vacuum gauge pipe 真空压力计：compound gauge,vacuum manometer ...
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vacuum m gauge pipe 真空压力计管
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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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