using obturating elements, e.g. washers, inserted and operated independently of each other

Full Title

Arrangements for sealing leaky tubes or conduits > using obturating elements, e.g. washers, inserted and operated independently of each other

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

HEAT EXCHANGE IN GENERAL

Subclass:

DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION