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Machinery & Equipment PurchaseAir Condition Equipment Purchases Pressure Ventilator [2007-11-07]The function of this ventilator is to keep the inside and outside prsssure to be balanceable , even if the inside temperature is below 0¡æ, so as to ensure free opening of the door . With a temperature controller inside the window , whic... Company: Shanghai Zhuoli Refrigeration Equipment Co.,Ltd |