At this time, because {HEAD ~ the portions} of the shoelace 220 which are inserted through the auxiliary through hole 132 are maintained in a bent state during the course of pulling the portions of the shoelace 220, they resist being pulled, whereby the portions of {TAIL ~ the shoelace} 220 which are inserted into the auxiliary through hole 132 are not willing to be untied, thereby to be maintained in a firmly tightened state 
At this time , because { HEAD ~ the portions } of the shoelace 220 which are inserted through the auxiliary through hole 132 are maintained in a bent state during the course of pulling the portions of the shoelace 220 , they resist being pulled , whereby the portions of { TAIL ~ the shoelace } 220 which are inserted into the auxiliary through hole 132 are not willing to be untied , thereby to be maintained in a firmly tightened state
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH