The runner 44 is accommodated at the fixing portion 431, and is capable of {HEAD ~ up and down sliding movements} at {TAIL ~ the fixing portion} 431 
at
The runner 44 is accommodated at the fixing portion 431 , and is capable of { HEAD ~ up and down sliding movements } at { TAIL ~ the fixing portion } 431
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH