{TAIL ~ The connecting block} 3 is associated with {HEAD ~ vertical guide rails} on the front of the main body 1 so that it can be moved up and down 
{ TAIL ~ The connecting block } 3 is associated with { HEAD ~ vertical guide rails } on the front of the main body 1 so that it can be moved up and down
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH 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