汽、柴油发电机组作为一种辅助的发电装置应用日渐广泛，但其产生的噪声特别是排气噪声，对环境产生极大污染，为人们生活带来不便。
The generator is using widely as an auxiliary electric equipment, but it will take us noise especially the exhaust noise which can pollute the environment seriously and bring our life inconvenience.
本实用新型属于柴油发动机加热附件系统中用循环泵，特别涉及一种液体循环泵。
The utility model relates to a circulating pump that belongs to the heating accessory system of the diesel engine, in particular relates to a liquid circulating pump.
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