Since {TAIL ~ the constitution} of {HEAD ~ the buckle} and the length adjustment are obvious, their further explanation is not made here 
Since { TAIL ~ the constitution } of { HEAD ~ the buckle } and the length adjustment are obvious , their further explanation is not made here
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH