{HEAD ~ The coal charge} 11 piles up on {TAIL ~ closure element} 5, and during filling, the upper surface of the coal charge 11 will adjust itself to be approximately parallel to the sloping walls 10, as is generally shown in FIG 1 
piles up on
{ HEAD ~ The coal charge } 11 piles up on { TAIL ~ closure element } 5 , and during filling , the upper surface of the coal charge 11 will adjust itself to be approximately parallel to the sloping walls 10 , as is generally shown in FIG 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH