NP 4381-1999
Solid fuels Coals International classification of in seam coals, ECE-United Nations

Standard No.

NP 4381-1999

Release Date

1999

Published By

PT-IPQ

Latest

NP 4381-1999

NP 4381-1999 history

• 1999 NP 4381-1999 Solid fuels Coals International classification of in seam coals, ECE-United Nations