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Standards [CURRENT]

DIN 21633

Air regulating systems for mining - Wing air doors for haulage tracks - Double-wing type doors without pressure reduction
Edition 2011-03

Standards [CURRENT]

DIN 21634

Air regulation systems for mining - Swinging roadway air doors for haulage tracks
Edition 2011-03

Standards [CURRENT]

DIN 21635

Air regulation systems in mining - Air locks - Building and operation
Edition 2016-09

Standards [CURRENT]

DIN 21636

Air regulation systems for mining - Belt-conveyors-way air locks - Dimensions, identifications, requirements and testing
Edition 2016-09

Standards [CURRENT]

DIN 21637

Air regulation systems for mining - Wing air doors for haulage tracks - Double-wing type doors with pressure reduction
Edition 2016-09

Standards [CURRENT]

DIN 21638

Air regulation systems for mining - Wing air locks for travelling tracks - Double-wing type doors with pressure reduction
Edition 2016-09

Standards [CURRENT]

DIN 21639

Air regulation systems for mining - Travel-way air locks with pressure-relief air doors
Edition 2019-06

Standards [CURRENT]

DIN 21773

Gears - Cylindrical involute gears and gear pairs - Inspection dimensions of tooth thickness
Edition 2014-08

Standards [CURRENT]

DIN 21800

Symbol mallet and iron
Edition 1989-06

Standards [CURRENT]

DIN 21802

Symbols for mine rescue and gas protection squads
Edition 1989-06

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