The speed of {HEAD ~ the conveyer belt} 10 should be reduced as much as possible but the load for its operation increases and it may become impossible to accurately control {TAIL ~ the speed} of the motor 21 
The speed of { HEAD ~ the conveyer belt } 10 should be reduced as much as possible but the load for its operation increases and it may become impossible to accurately control { TAIL ~ the speed } of the motor 21
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH 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 OTH OTH OTH OTH