FIELD: growing of mushrooms in underground openings of operating mines. SUBSTANCE: substrate is located in underground openings which are situated in immediate proximity to air supply shaft so that air delivered through shaft and spread in all directions of mine field heats rock mass which surrounds shaft both in winter and in summer. EFFECT: high efficiency. 1 dwg
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Authors
Dates
1997-05-27—Published
1993-12-27—Filed