a lid member including an elongated plate portion dimensioned to extend along said straight side of the casing and to fit closely between said projecting edge portions, and ears projecting from {TAIL ~ opposite ends} of said plate portion at right angles to the latter for disposition against said end portions of {HEAD ~ the peripheral wall} 
a lid member including an elongated plate portion dimensioned to extend along said straight side of the casing and to fit closely between said projecting edge portions , and ears projecting from { TAIL ~ opposite ends } of said plate portion at right angles to the latter for disposition against said end portions of { HEAD ~ the peripheral wall }
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 OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD