{TAIL ~ The locking mechanism} includes a strip shaped portion having {HEAD ~ a free end portion} and an engagement hole into which the free end portion projects when the cover is closed 
{ TAIL ~ The locking mechanism } includes a strip shaped portion having { HEAD ~ a free end portion } and an engagement hole into which the free end portion projects when the cover is closed
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH