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Rooftoppers usually take photos or videos and panoramic photographs—either a selfie by themselves or with the help of a crew of assistants or accomplices, present on the climb or filming from a distance. Rooftoppers often use helmet cameras for videos. [4] [5] [6] Some also use quadcopter drones for exploration and recording. [7]
An extractor also performs the function of an ejector in revolvers. When the striking force applied to the ejector rod is hard and fast enough, the extractor will typically eject the empty case(s) from the cylinder. Some break-action shotguns are also designed to eject empty shells completely out of the chamber when the barrel is opened.
A roof pentaprism used in Single-lens reflex cameras; the lower right face is the roof (dach). An Amici roof prism. A roof prism, also called a Dachkanten prism or Dach prism (from German: Dachkante, lit. "roof edge"), is a reflective prism containing a section where two faces meet at a 90° angle, resembling the roof of a building and thus the name.
An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...
The sight has two day channels; a direct one with ×3.3 and ×10 magnification (×14 in case of the UAE version) and a video channel with ×10 magnification. The thermal channel offers ×3 and ×10 magnifications. The Athos thermal imager has a detection range of 5000 m, can recognize targets at 2500 m and identify them at 2000 m. [17]
A Soxhlet extractor is a piece of laboratory apparatus [1] invented in 1879 by Franz von Soxhlet. [2] It was originally designed for the extraction of a lipid from a solid material. Typically, Soxhlet extraction is used when the desired compound has a limited solubility in a solvent , and the impurity is insoluble in that solvent.
A honey extractor is a mechanical device used in the extraction of honey from honeycombs. A honey extractor extracts the honey from the honey comb without destroying the comb. Extractors work by centrifugal force. A drum or container holds a frame basket which spins, flinging the honey out.
There is a general understanding that it was explosive steam pressure from the damaged fuel channels escaping into the reactor's exterior cooling structure that caused the explosion that destroyed the reactor casing, tearing off and blasting the upper plate called the upper biological shield, [39] to which the entire reactor assembly is ...