In its operating position, the head is turned at {TAIL ~ an angle} of 90° to the shaft, whereby {HEAD ~ the pulleys} lie in the same plane 
In its operating position , the head is turned at { TAIL ~ an angle } of 90 ° to the shaft , whereby { HEAD ~ the pulleys } lie in the same plane
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH