摘要 |
<p>Each stage 1, 2, 3 is driven independently of any other stage by its own drive 4, 4', 4'', such as a D.C. electric motor fed with rectified A.C. current, an internal combustion engine or a turbine. Intercoolers 7, 7', an inlet silencer 5 and, it may be, an outlet silencer are provided. <IMAGE></p> |