:

:

 

16 1999 . N 526-

 

 

 

12

 

 

Explosionprotected electrical apparatus.

Part 12. Classification of mixtures of gases or vapours

with air according to their maximum experimental safe

gaps and minimum igniting currents

 

51330.11-99

( 60079-12-78)

 

02

 

29.260.20, 3402

 

1 2001

 

 

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