In {HEAD ~ addition}, reference numeral designates front and rear side walls which are slidably held in contact with the front and rear side portions of the same bellows , and the top end portions of these front and rear side walls are fixedly secured to {TAIL ~ the member} that is integral with the machine frame 
In { HEAD ~ addition } , reference numeral designates front and rear side walls which are slidably held in contact with the front and rear side portions of the same bellows , and the top end portions of these front and rear side walls are fixedly secured to { TAIL ~ the member } that is integral with the machine frame
OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH