... Tempered Martensite HRC:40-50 My company has been engaged in the development of agricultural machinery and equipment for the ... plowing, ridge knife, knife stubble, reclamation knife, knife tillers, disc harrow, disc plows piece, spring-tooth, etc., and to map non-standard ... ! Cultivator rotary tiller blade, tractor parts, s-tine, spring, disc harrow, mower blade, break shovel, cutter, plow point