MZLH 42 pellets making machine: 1,for biomass fuel 2,ring ... 6mm,8mm,10mm,etc pellets MZLH 42 pellets making machine: Main structure and working principle: 1,High ... is driven by variable frequency motor, convenient for adjusting feeding quantity, and insure feed even.4,High ... feeder: variable pitch anti coking arch structure . Speed adjusting control by frequency conversion8, Motor and gear shaft: new ...