活塞式压缩机资格最老，用的地方很多如冷库、中央空调机组、还有小型活塞式压缩机用在冰箱和空调中。
The piston compressor, the oldest in places such as the cold storage, many central air conditioning unit, and small piston compressor in the fridge and air conditioning.
活塞式压缩机资格最老，用的地方很多如冷库、中央空调机组、还有小型活塞式压缩机用在冰箱和空调中。
The piston compressor, the oldest in places such as the cold storage, many central air conditioning unit, and small piston compressor in the fridge and air conditioning.
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