standard or non standard gear,made according to ISO, DIN,ANSI,JIS,BS standard C45 ... components, such as standard sprockets, taper lock sprockets, special sprockets,motorcycle sprocket ,chain couplings, shafts, gears, box gears,roller chain, agriculture ... advanced heat treatment craft.gearsprocketbevel geargear shaftring gearworm set bevel gear pinion gear shaft