The engagement portions are engaged with the latch portions so that {HEAD ~ the holder arm} is kept in {TAIL ~ an expanded state} 
The engagement portions are engaged with the latch portions so that { HEAD ~ the holder arm } is kept in { TAIL ~ an expanded state }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL