TCVN 4921-1989
Brown coals and lignite.Classification based on total moisture content and tar yield

Standard No.

TCVN 4921-1989

Release Date

2008

Published By

VN-TCVN

Latest

TCVN 4921-1989

TCVN 4921-1989 history

• 2008 TCVN 4921-1989 Brown coals and lignite.Classification based on total moisture content and tar yield