A hopper 30 is fixed to the casing 10 with its opening at the bottom directed to the top end of {TAIL ~ the gap A} between {HEAD ~ the stator} 16 and the rotor 11 
A hopper 30 is fixed to the casing 10 with its opening at the bottom directed to the top end of { TAIL ~ the gap A } between { HEAD ~ the stator } 16 and the rotor 11
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH