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Standard
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UNE 22090:1955 (R1999)
EFFICIENCY CALCULATION OF THE COAL MINES.
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Technical characteristics
| Publisher | Asociacion Espanola de Normalizacion y Certificacion (AENOR) |
| Publication Date | 02/15/1955 |
| Confirmation Date | 10/01/1999 |
| Cancellation Date | 10/27/2022 |
| Page Count | 2 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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Previous versions
15/02/1955
Withdrawn
, Reaffirmed
Most Recent