 |
| |||
| roof tapping | |||
| tapping the roof; sounding (Leonid Dzhepko); back sounding; inspecting of back (выработки); roof sounding; roof testing; roof bowling; roof knocking | |||
| остукивание кровли: 11 do fraz, 2 tematyki |
| Geologia | 2 |
| Górnictwo | 9 |
|
| |||
| roof tapping | |||
| tapping the roof; sounding (Leonid Dzhepko); back sounding; inspecting of back (выработки); roof sounding; roof testing; roof bowling; roof knocking | |||
| остукивание кровли: 11 do fraz, 2 tematyki |
| Geologia | 2 |
| Górnictwo | 9 |