... factory 2.best service,quality and price 3.low gas consumption engine 4.water cooling,4-stroke gen 5.CE&ISO9001 ... systemAutomatic alarm systemDetailed Product Description Standard Configuration of Natural Gas Generating Set: Engine: 1,water cooling , 4 stroke 2,ratiation with ... single bearing,4pole and self excited brushless. 2,insulation --H class,Protection -- IP22 (IP23 in marine) 3,AVR(auto voltage ...