{TAIL ~ The mulching mower} 10, 11 or 12, wherein lengths of {HEAD ~ said upper and lower cutter blades} are equal 
{ TAIL ~ The mulching mower } 10 , 11 or 12 , wherein lengths of { HEAD ~ said upper and lower cutter blades } are equal
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH