{TAIL ~ The coal charge} 11 piles up on {HEAD ~ 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 
{ TAIL ~ The coal charge } 11 piles up on { HEAD ~ 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
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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