a lid member including {HEAD ~ 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 opposite ends of said plate portion at right angles to {TAIL ~ the latter} for disposition against said end portions of the peripheral wall 
a lid member including { HEAD ~ 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 opposite ends of said plate portion at right angles to { TAIL ~ the latter } for disposition against said end portions of the peripheral wall
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 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