low-pressure steam engine

from The Collaborative International Dictionary of English v.0.48

Low-pressure \Low"-pres`sure\, a.
   1. Having, employing, or exerting, a low degree of pressure.
      [1913 Webster]

   2. same as {easygoing}, 4; as, a low-pressure salesman.

   Syn: easygoing.
        [WordNet 1.5]

   {Low-pressure steam engine}, a steam engine in which low
      steam is used; often applied to a condensing engine even
      when steam at high pressure is used. See {Steam engine}.
      [1913 Webster]