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Auxiliary ventilation in mining is always necessary when underground working places are not connected to the main air current. This standard applies to sheet steel reducers which serve as connecting pieces between ventilation equipment with flange joints.
| Author | DIN |
|---|---|
| Editor | DIN |
| Document type | Standard |
| Format | File |
| ICS | 73.100.20 : Ventilation, air-conditioning and illumination equipment
|
| Number of pages | 5 |
| Replace | DIN 21614 (1990-07) |
| Year | 2009 |
| Document history | DIN 21614 (2009-10) |
| Country | Germany |
| Keyword | 21614 |