The upper casing member is provided at {HEAD ~ a rear portion} of both sides thereof with holding members through which {TAIL ~ the casing} is grasped 
The upper casing member is provided at { HEAD ~ a rear portion } of both sides thereof with holding members through which { TAIL ~ the casing } is grasped
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH