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• Screw-pile lighthouse — Screw pile lighthouses stand on piles that are screwed into sandy or muddy sea or river bottoms. The first screw pile lighthouse was built by blind Irish engineer Alexander Mitchell. It was constructed in 1838 at the mouth of the Thames and was… …   Wikipedia

• Screw cap — A screw cap or closure is a common type of closure for bottles, jars, and tubes. Common screw closures: Plastic bottle with plastic screw cap, Dispensing closure for salad dressing (with inner seal), Break away closure for syrup, Dispensing pump… …   Wikipedia

• screw up — 1) PHR V ERG If you screw up your eyes or your face, you tighten your eye or face muscles, for example because you are in pain or because the light is too bright. [V P n (not pron)] She had screwed up her eyes, as if she found the sunshine too… …   English dictionary

• Open marriage incidence — Relationships Types …   Wikipedia

• Reciprocating screw machinery — is used for the extrusion blow molding of hollow containers. Examples of parts manufactured from these machines include lightweight HDPE bottles for dairy and water, as well as large 3 5 gallon polycarbonate bottles for water coolers. Description …   Wikipedia

• List of screw drives — Contents 1 Common types 1.1 External types 1.1.1 Square 1.1.2 Hex …   Wikipedia

• Twin-screw type supercharger — The twin screw type supercharger or twin screw blower is a positive displacement type device that operates by pulling air through a pair of meshing high tolerance screws not dissimilar to a set of worm gears. Twin screw superchargers are also… …   Wikipedia

• Ball screw — A ball screw is a mechanical device for translating rotational motion to linear motion. A threaded shaft provides a spiral raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads… …   Wikipedia

• Tractor screw — Tractor Tract or, n. [NL., from L. trahere, tractum, to draw.] 1. That which draws, or is used for drawing. [1913 Webster] 2. pl. (Med.) Two small, pointed rods of metal, formerly used in the treatment called Perkinism. [1913 Webster] 3. a motor… …   The Collaborative International Dictionary of English

• archimedes' screw — noun Usage: usually capitalized A : a device consisting of a tube bent spirally around an axis or of a broad threaded screw incased by a hollow open cylinder and used to raise water by rotating the apparatus when partly immersed in a slantwise… …   Useful english dictionary

• Lead screw — Lead Lead, n. 1. The act of leading or conducting; guidance; direction; as, to take the lead; to be under the lead of another. [1913 Webster] At the time I speak of, and having a momentary lead, . . . I am sure I did my country important service …   The Collaborative International Dictionary of English