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原帖由: Salina Hocutt ,

文本:

HVAC sysyem is used for Heating and cooling of a Device which is electronically used for specific puposes.

For Heating or cooling of a device special types of gases are used in to these devices which maintains the temperature of a particular space by using R12 type of gases.

These gases are costly and for recovery of this type of gases A [https://www.refrigerantrecoverymachine.com/|Refrigerant Recovery Machine] is used.

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