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phrases
потолочина ncontraintes
génér. ceiling beam
apic., makar. crown board
constr., expl. ceiling (выработки)
expl. roof coal; arch pillar; cap pillar; floor pillar
Gruzovik, matér. ceiling beam
or;extr., géol. crown pillar (Jewelia)
потолочина: 2 phrases, 2 sujets
Exploitation minière1
Makarov1