STAS 12720/4-1989
Equipment for hydrogeological drilling BIT COLLARS FOR COUNTER FLUSH DRILLING BY ABSORPTION OR AIRLIFT Dimensions

Standard No.

STAS 12720/4-1989

Release Date

1989

Published By

RO-ASRO

Latest

STAS 12720/4-1989

Scope

Prezentul standard stabile?te dimensiunile pr?jinilor grele pentru forajul cu circula?ie invers? prin absorb?ie sau aer-lift, folosite la forajul sondelor hidrogeologice.

STAS 12720/4-1989 history

• 1989 STAS 12720/4-1989 Equipment for hydrogeological drilling BIT COLLARS FOR COUNTER FLUSH DRILLING BY ABSORPTION OR AIRLIFT Dimensions

STAS 12720/4-1989 -All Parts