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