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Drilling Methane Drainage Boreholes in Hard Strata with the Nüsse & Gräfer P.IV/6 Machine (booklet)
Information Bulletin No. 56/176. 6 pages.
Collection Area
Industry
Item Number
2018.42/142
Creation/Production
National Coal Board Production Department
Acquisition
Old stock, 26/1/2018
Measurements
Length
(mm): 331
Width
(mm): 204
Material
card
paper
metal
Location
In store
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