Each of us is full of too many wheels, screws and valves to permit us to judge one another on a first impression or by two or three external signs. Anton Chekhov
Rossi was the first to describe another system working with valves in parallel; it has the advantage that it can easily be extended to coincidences between more than two events, and is therefore predominantly used today. Walther Bothe
A complex arrangement of rigid steel piping and stop valves regulate flow to various parts of the building Plumbing is any system that conveys fluids for a wide range of applications. Source: Internet
Active microfluidics refers to the defined manipulation of the working fluid by active (micro) components such as micropumps or micro valves. Source: Internet
A core standard valve layout based on the action of three valves had become almost universal by (at latest) 1864 as witnessed by Arban's Method published in that year. Source: Internet
A horn without valves is known as a natural horn, changing pitch along the natural harmonics of the instrument (similar to a bugle ). Source: Internet