letters patent of tubular heat exchanger for the food industry

letters patent of double spiral-tube heat exchanger

letters patent of double seal high pressure plate heat exchanger

letters patent of double seal high pressure plate heat exchanger

letters patent of unmanned quick installed comparment heat exchange station

letters patent of unmanned quick installed comparment heat exchange station

utility model patent certificate of suspension type building intelligent unit

utility model patent certificate of suspension type building intelligent unit

letters patent of spiral-flow type tube and shell heat exchanger

letters patent of a plate heat exchager

letters patent of the untility model relates to a heat transfer palte with reinforced positioning hole for plate heat exchanger

letters patent of the utility model relates to countercurrent gas heat exchanger