PL66717B1 - - Google Patents
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- Publication number
- PL66717B1 PL66717B1 PL128653A PL12865368A PL66717B1 PL 66717 B1 PL66717 B1 PL 66717B1 PL 128653 A PL128653 A PL 128653A PL 12865368 A PL12865368 A PL 12865368A PL 66717 B1 PL66717 B1 PL 66717B1
- Authority
- PL
- Poland
- Prior art keywords
- boom
- canopy
- support
- plate
- variation
- Prior art date
Links
- 238000005065 mining Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 244000144992 flock Species 0.000 claims 1
- 239000011435 rock Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL66717B1 true PL66717B1 (cs) | 1972-08-31 |
Family
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