the inducing fluid being mercury vapour

Full Title

Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow (diffusion pumps F04F9/00; combination of jet pumps with pumps of other than jet type F04B; use of jet pumps for priming or boosting non-positive-displacement pumps F04D) > the inducing fluid being elastic fluid > characterised by using specific inducing fluid > the inducing fluid being mercury vapour