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2. Hobbs meter - Wikipedia

   en.wikipedia.org/wiki/Hobbs_meter

   Hobbs meter is a generic trademark for devices used in aviation to measure the time that an aircraft is in use. The meters typically display hours and tenths of an hour, but there are several ways in which the meter may be activated: It can measure the time that the electrical system is on. This maximizes the recorded time.

3. Pressure switch - Wikipedia

   en.wikipedia.org/wiki/Pressure_switch

   The contacts of the pressure switch may be rated a few tenths of an ampere to around 15 amperes, with smaller ratings found on more sensitive switches. Often a pressure switch will operate a relay or other control device, but some types can directly control small electric motors or other loads.

4. Swissmetro - Wikipedia

   en.wikipedia.org/wiki/Swissmetro

   SwissMetro-NG is the modern version of the original project. It is, so to speak, the version 2.0, which was proposed by the Swiss Transportation Research Institute. [7] Air resistance and aerodynamic problems are eliminated altogether by removing all of the air in the tunnels.

5. Sail switch - Wikipedia

   en.wikipedia.org/wiki/Sail_switch

   A sail switch, vane switch or flow switch is a mechanical switch that is actuated on or off in response to the flow or non-flow of a fluid such as air or water. [1] A sail switch typically operates through the use of a paddle or a diaphragm which gets displaced due to the force of fluid or air moving past it.

6. Dry running protection - Wikipedia

   en.wikipedia.org/wiki/Dry_running_protection

   There are three different methods for detection of water shortage: Pressure switch on suction manifold or float switch/electrode relay in the supply tank: Dry-running protection with pressure/level switch. Measurement of inlet pressure in the suction manifold by means of an analogue pressure transmitter: Dry-running protection with pressure ...

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!