sight+tube

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• Sight glass — A sight glass or water gauge is a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within. Liquid in tanksSimple sight glasses may be just a plastic or glass tube connected to the bottom of …   Wikipedia

• Sight (device) — Sights redirects here. For the rock band, see The Sights .A sight is an optical device used to assist aim by guiding the eye and aligning it with a weapon or other item to be pointed. Various forms of sights exist, such as iron sights, red dot… …   Wikipedia

• sight glass — i. A transparent tube on the outside of a reservoir or tank that shows the level of the fluid in the container. ii. A small window in the high side of a vapor cycle cooling system. The system is fully charged if there are no bubbles seen in the… …   Aviation dictionary

• sight-feed — ˈ ̷ ̷ˌ ̷ ̷ adjective : of or belonging to a feed pipe fitting, device, or system arranged so that the flowing liquid may be observed through a transparent section of a tube or wall sight feed oil cup …   Useful english dictionary

• sight glass — noun a transparent tube or window through which the level of liquid in a reservoir or supply line can be checked visually …   English new terms dictionary

• sight glass — A viewing glass or window set in the refrigerant pipe of a car s air conditioning system, usually in the top of the receiver drier, which allows a visual check of the refrigerant passing from the receiver to the evaporator. The fluid should be… …   Dictionary of automotive terms

• sight glass — noun : a transparent section in a pipe or tank wall for giving visual indication of level or flow of liquids * * * n. a transparent tube or window through which the level of liquid in a reservoir or supply line can be checked visually …   Useful english dictionary

• Iron sight — Sight picture through iron sights of an H K MP5 submachine gun. The annular shroud around the front post sight is aligned with the rear peep sight to ensure the weapon is properly trained. Iron sights are a system of shaped alignment markers… …   Wikipedia

• Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …   Wikipedia

• Red dot sight — A red dot sight (also called a reflex sight or, for certain models, a reflex scope) is a non magnifying firearm sight that uses an illuminated reticle, typically in the form of a red dot. [cite journal |url=http://findarticles.com/p/articles/mi… …   Wikipedia

• Mark XIV bomb sight — The Mk. XIVA sighting head, which would be mounted in the front of the aircraft and connected to the computor by the cables coiled up on the left. The main features are the gyrostabilizer in the large cylinder, and the collimator on the moving… …   Wikipedia