Econic Series features a super large fuel tank. Special arrangement of the unit comes with vertical ventilation for both inlet and outlet of air and with a more precise configuration. The whole endosure is completed with una-bridged steel plate which top lifing beam is not required as the complete set is equipped with forklifling sockets as well asstrong troling opening for easy of transportation. The large door of the endosure can make maintenance process a lot easier. In addition, the outer locked fuel refiling inlet can also enable a more smooth operation.