... 23% energy than HM DW-III series, save about 40% water than HM DW-III series;HM DW-V series, five ... 20% energy than HM DW-IV series, save about 58% water than HM DW-IV series; HM DW-VI series, six ... 17% energy than HM DW-V series, save about 77% water than HM DW-V series; HM DW-VII series, seven ... about 15% energy than HM DW-VI series, save 100% water than HM DW-VI series; HM DW-VIII series, eight ...