a lid portion having {HEAD ~ a cap} through {TAIL ~ hole} formed therein to penetrate the lid portion in the sliding direction, the lid portion having a surrounding portion that surrounds the cap through hole; and 
through
a lid portion having { HEAD ~ a cap } through { TAIL ~ hole } formed therein to penetrate the lid portion in the sliding direction , the lid portion having a surrounding portion that surrounds the cap through hole ; and
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH