MZLH 42 wood forming machine: 1,for biomass fuel 2,ring die pellet mill 3, ... motor 4,6mm,8mm,10mm,etc pellets MZLH 42 wood forming machine: Main structure and working principle: 1,High efficient gear drive ... gear and gear shaft adopt carburizing and quenching , processed by hard gear surface technique. Stable transmission. Low noise. Long service life ...