{HEAD ~ The upwardly directed wind}, generated at the blade approaching portion 51 as described above, raises {TAIL ~ uncut grasses} at the blade approaching portion 51 
{ HEAD ~ The upwardly directed wind } , generated at the blade approaching portion 51 as described above , raises { TAIL ~ uncut grasses } at the blade approaching portion 51
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH