Regarding {HEAD ~ the cassette} 20, including {TAIL ~ flap} 21, the statements in the context of the preferred embodiment shown in FIG 2 apply correspondingly 
including
Regarding { HEAD ~ the cassette } 20 , including { TAIL ~ flap } 21 , the statements in the context of the preferred embodiment shown in FIG 2 apply correspondingly
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH