The side members are gripped by gripping {HEAD ~ means} to maintain the side members along {TAIL ~ respective straight transverse axes} 
The side members are gripped by gripping { HEAD ~ means } to maintain the side members along { TAIL ~ respective straight transverse axes }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL