diaphragm control
121Gas meter — A gas meter is used to measure the volume of fuel gases such as natural gas and propane. Gas meters are used at residential, commercial, and industrial buildings that consumes fuel gas supplied by a gas utility. Gases are more difficult to… …
122Georg Neumann — A classic Neumann U87 microphone Georg Neumann GmbH (Neumann), founded in 1928 and based in Berlin, Germany, is a prominent manufacturer of professional recording microphones. Their best known products are condenser microphones for broadcast,… …
123Difference between gauge and absolute pressure — The most common pressure reference is gauge pressure signified by a (g) after the pressure unit e.g. 30 psi g, which means that the pressure measured is the total pressure minus atmospheric pressure. There are two types of gauge reference… …
124Waterhouse stop — The Waterhouse stop or Waterhouse diaphragm is an interchangeable diaphragm with an aperture (hole) for controlling the entry of light into a camera. A thin piece of metal (the diaphragm) is drilled with a hole (the aperture); a set of these with …
125List of muscles of the human body — Skeletal muscles homo sapiens Muscles of the human body: Overview Head  |  Neck  |&# …
126Nathan Manufacturing, Inc. — Nathan Manufacturing, Inc. is a division of Micro Precision Group which makes Airchime, Ltd. train horns for North America. It is one of two major horn manufacturers in the United States, Leslie Controls, Inc. being the other. Nathan horn… …
127Spinal cord — Latin medulla spinalis The spinal cord nested in the vertebral column …
128Camera — For other uses, see Camera (disambiguation). Various cameras A camera is a device that records and stores images. These images may be still photographs or moving images such as videos or movies. The term camera comes from the camera obscura… …
