Việt
vỉa than
vỉa than đá
tầng than
Anh
coal seam
Đức
Kohlenflöz
Kohlenflöz /das (Bergbau)/
vỉa than đá; tầng than;
Kohlenflöz /nt/THAN/
[EN] coal seam
[VI] vỉa than