This product is manufactured by our company that combining with the int ernal and external base of advanced technology and craft. The material of h- eat-exchange pipe, adopted low-rib finned red copper pipe, used the structure of transverse current breaker board, turbulence board and the advanced manufacture craft of mechanism expanding, has the features of novel structure, small dimension, light weightand well heat-exchanging effect a- nd soon. This product is a new type and higli efficiency cooler, mainly used in low-viscosity hydraulic and oil system to cool the work oil to the specified temperature. So it is an Ideal cooling facility that can be widely used in cooling the hydraulic equipment in the trade such as chemical industry, electric power, metallurgical industry, mine and light industry and soon.