a transmission cover member sealingly engaging {TAIL ~ at least a portion} of {HEAD ~ the lateral wall} of said case main body to cover the recessed portion thereof in a fluid tight manner; and 
a transmission cover member sealingly engaging { TAIL ~ at least a portion } of { HEAD ~ the lateral wall } of said case main body to cover the recessed portion thereof in a fluid tight manner ; and
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH 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