Cold and heat source in the negative layer, select the centrifugal unit, and then choose the cooling tower and air conditioning units, auxiliary equipment and cooling water system pumps select estimates were made; duct damping gave a brief description.

In the cold heat design for a layer, select centrifugal units, cooling tower and use air conditioning units, and auxiliary equipment to pump cooling water system for the selection of the duct damper estimates; A brief description.

Cold heat source design in -1, the choice centrifugal type unit, selects the cooling tower and the air conditioning unit supporting facility again, and to cooled the aqueous system water pump choice to make the estimate; Has given the brief explanation to the air flue absorption of shock.

Design of cold and heat source in a layer, select the centrifugal chiller, selection of cooling towers and air conditioning unit auxiliary equipment, and estimation of the cooling water system pump selection was; air shock for a brief description.

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