{TAIL ~ a plurality} of second gripping members which are associated with {HEAD ~ the bottom portion} and protrude from the interior surface thereof 
{ TAIL ~ a plurality } of second gripping members which are associated with { HEAD ~ the bottom portion } and protrude from the interior surface thereof
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH