{TAIL ~ The propped block} has several spaced horizontal propped surfaces on {HEAD ~ the bottom} thereof which are formed at different heights with slopes formed in between 
{ TAIL ~ The propped block } has several spaced horizontal propped surfaces on { HEAD ~ the bottom } thereof which are formed at different heights with slopes formed in between
TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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