Detailed Product Description 1.WNS horizontal inner-combustion boiler series are adopted advanced tri-backhauling & wet-back structure .which greatly ... ,heavy oil , final residuum, natural gas ,city gas ,liquid gas.7. boiler efficiency can reach 90%,economical and energy saving ,low ... well-formedModelItemWNS0.14-0.7/95/70-Y(Q)WNS0.35-0.7/95/70-Y(Q)WNS0.7-0.7/95/70-Y ...