... blade, notched plough disc,,notched harrow disc,agricultural disc,plain plow disc bladesMaterial: 65 Manganese Steel Hardness: 38 to 45 ... of the industry standard of the disc harrow and share plough in China,which is China's outstanding agricultural ... produce with the brand of Qingquan:disc harrow,disc plough,share plow, rotary tiller,potato planter,potato harvester,cultivator,subsoiler,seeder, ...