... ,skilled. 2.ISO9001:2000-GB/T19001:2000 certified,stable operation and safe 3.YINCHANG brand 1.WNS horizontal inner-combustion ... environment friendly .5.the boiler is fully automatic ,easy to operation.6.widely applicable fuel ,such as light oil ,heavy ... efficiency can reach 90%,economical and energy saving ,low cost for operation .8. the boiler shell covered with polishing stainless ,pleasing ...