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TYPICAL SITUATIONS <br />SCAtF 1` • 40~ <br />(TIYffRING il<1TTERH i0R BIOCJCS FROM 80~T0>a0~ CENTERS) <br />00 <br />00 <br />00 <br />COAL <br />IN <br />PLACE <br />COAL IN <br />PLACE <br />TIMBERS <br />SET AFTER <br />CUT ii 9 <br />0 0~ <br />oo °o ~f~.o - o <br />0 0 .* o - - o <br />.C OAL <br />IN <br />PLACE <br />COAL <br />IN <br />PLACE <br />.~ <br />TIMBERS 00-0 <br />SET AFTER O O O <br />CUT at 7 <br /> O <br /> O <br />COAL IN o <br />PLACE <br /> o <br /> 0 <br />TIMBERS ~.O <br />•S ET AFTER <br /> <br />CUT iY 4 -0O O <br /> 00-0 <br />BARRIER <br />~- <br />0 00 <br />0 00 <br />- 0 00 <br />8 <br />'p O O -- O -~ 00 - <br />m1~Q OO 0--- 0-- 00 _ <br />(6ffj - -O ----- O 00 <br />TIMBERS O <br />:SET AFTER O <br />' CUT ~ 2 <br />COAL IN D <br />PLACE <br />-O <br />O O <br />0 <br />0 <br />IC <br />J` <br />0 <br />0 <br />00 <br />pp <br />COAL I N <br />PLACE <br /> 4 3 <br />5 <br />2 <br />1 <br />GOB <br />GOB <br />Goe <br /> <br />