{HEAD ~ The replaceable sludge can} is disposed at an opening of {TAIL ~ the bottom} of the external container 
{ HEAD ~ The replaceable sludge can } is disposed at an opening of { TAIL ~ the bottom } of the external container
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH