All closed panels with Freon-free polyurethane foam jointed by adhesive is much different from traditional sandwich panels with connect by metal. This new design is over pass the performance of the other manufacturer' s product. CIMC-Kogel has been achieved ATP certificate. 40 ft refrigerated semi-trailer can be produced by one piece of panel with glue without any additional connection. Transport temperature can be controlled within 0 to -40; Total thermal transmittance & gas leakage rate can reach the A class Standard of China; CIMC-Kogel' s ice-cream truck with side doors has been famous at home & abroad. It can be compared with any same products of the world; CIMC-Kogel had supplied Daily living apartment and experiment camping shelter to the South Pole Scientific Investigation Station of People' s Republic of China.