a lid portion having {TAIL ~ a cap} through {HEAD ~ 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 
a lid portion having { TAIL ~ a cap } through { HEAD ~ 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH 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