B 4-90-76 Standard name: Conduit flexible connection technical conditions This technical condition applies to standards: HB4-85-76; HB4-86-76; HB4-87-76; HB4-88-76 and HB4-110-76 Conduit flexible connection.
HB 4-90-1976 history
1984HB 4-90-1983 Technical conditions for flexible connection of conduit
1976HB 4-90-1976 Technical conditions for flexible connection of conduit