At a top of {TAIL ~ the replaceable sludge can} is a hoisting ring tied with {HEAD ~ a hoisting sling} 
At a top of { TAIL ~ the replaceable sludge can } is a hoisting ring tied with { HEAD ~ a hoisting sling }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD