| screw |
A boat's propeller.
출처: www.boatersdream.com/libarticles.cfm
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|---|---|
| screw |
The screw is an inclined plane wrapped around a cylinder. The advantage offered by the screw is that as it turns, rotary motion is converted into a straight motion. This motion can be used to move things apart (as in a car jack), or bring two objects together (a screw drawing two boards together). These devices are screws or have a screw component: jar lid, light bulb, piano stool, clamp, jack, wrench, key ring, and corkscrew.
출처: www.intel.com/education/design/session05/keyconcep...
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| screw e. |
a dental instrument designed to be screwed into a root canal for subsequent removal of the root, usually of the apical third.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| screw w. |
see screwworm.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| screw-worm f. |
Cochliomyia hominivorax.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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