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roof bolting
coal.	Ankerung der Firste; Verankerung der Firste
construct.	Gestängeausbau m
industr.	Ankerausbau m
mining.	im Hangenden
roof bolt
mining.	Ausbauanker m; Gesteinsanker m; Kurzanker m (im Felsbau)

roof bolting: 12 phrases in 4 subjects

Coal	4
General	3
Mechanic engineering	2
Mining	3