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Kammerpfeilerbruchbau
m
mining.
board-and-pillar
;
bord-and-pillar
(method)
;
bord-and-wall
;
brown panel system
;
chequer-board system
;
Lancashire bord-and-pillar system
;
Lancashire method
;
modified room-and-pillar working
;
narrow working
;
North Staffordshire method
;
pillar-and-breast
(method)
;
post-and-stall
(method)
;
rock-chute mining
;
room system
(with caving)
;
Warwickshire method
Kammerpfeilerbruchbau
:
5 phrases
in 1 subject
Mining
5
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