The casing also includes {HEAD ~ a slider} which is slidably mounted on the casing body or {TAIL ~ frame} so as to be slidable in a lateral direction of the casing body or frame, and is arranged so as to cover at least a part of a bottom and both sides of the lower casing member 
The casing also includes { HEAD ~ a slider } which is slidably mounted on the casing body or { TAIL ~ frame } so as to be slidable in a lateral direction of the casing body or frame , and is arranged so as to cover at least a part of a bottom and both sides of the lower casing member
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH