{TAIL ~ Two levers} pivotally mount the pressing roller on a housing which, in turn, is detachably mounted on a support, {HEAD ~ the housing} being extremely flat and bounding a chamber which has an open end 
{ TAIL ~ Two levers } pivotally mount the pressing roller on a housing which , in turn , is detachably mounted on a support , { HEAD ~ the housing } being extremely flat and bounding a chamber which has an open end
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH