a support unit for supporting the second end portion of the stopper, {HEAD ~ the support unit} being provided to {TAIL ~ the electronic device}, 
provided to
a support unit for supporting the second end portion of the stopper , { HEAD ~ the support unit } being provided to { TAIL ~ the electronic device } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH