either-direction
91Simple machine — This article is about the concept in physics. For the Internet forum software, see Simple Machines Forum. Table of simple mechanisms, from Chambers Cyclopedia, 1728.[1] Simple machines provide a vocabulary for understanding more complex machine …
92Tether propulsion — systems are proposals to use long, very strong cables (known as tethers) to change the velocity of spacecraft. The tethers may be used to initiate launch, complete launch, or alter the orbit of a spacecraft. Spaceflight using this form of… …
93Train station — Rail transport Operations Track Maintenance High speed Gauge Stations …
94Flush toilet — A flush toilet or Water Closet (WC) is a toilet that disposes of human waste by using water to flush it through a drainpipe to another location. Flushing mechanisms are found more often on western toilets (used in the sitting position), but many… …
95Massachusetts Turnpike — Massachusetts Turnpike …
96Climbing equipment — A wide range of equipment is used during rock climbing. The most popular types of climbing equipment are briefly described in this article. The article on protecting a climb describes equipment commonly used to protect a climber against the… …
97Motor controller — A motor controller is a device or group of devices that serves to govern in some predetermined manner the performance of an electric motor.[1] A motor controller might include a manual or automatic means for starting and stopping the motor,… …
98Inner German border — Innerdeutsche Grenze North and central Germany …
99Nauvoo Temple — For the modern structure rebuilt on the same site, see Nauvoo Illinois Temple. Nauvoo Temple Destroyed Undated photograph of the Nauvoo Temple …
100Safety wire — Safety wiring of two pairs of drilled head bolts Safety wire or lockwire is common in the aircraft and racing industries as an extra precaution to keep vital fasteners from unintentionally loosening and parts from falling off due to vibration or… …
