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单词 needle
释义 needle
[`nēd·ǝl]
BOTANY
A slender-pointed leaf, as of the firs and other evergreens.
COMPUTER SCIENCE
A slender rod or probe used to sort decks of edge- punched cards by inserting it through holes along the margin of the deck and vibrating the deck so that cards having that particular hole are retained, but those having a notch cut at that hole position drop out.
DESIGN ENGINEERING
1. A device made of steel pointed at one end with a hole at the other; used for sewing.
2. A device made of steel with a hook at one end; used for knitting.
ENGINEERING
1. A piece of copper or brass about 1/2 inch (13 millimeters) in diameter and 3 or 4 feet (90 or 120 centimeters) long, pointed at one end, thrust into a charge of blasting powder in a borehole and then withdrawn, leaving a hole for the priming, fuse, or squib. Also known as pricker.
2. A thin pointed indicator on an instrument dial.
ENGINEERING ACOUSTICS
See <<stylus>>
GEOLOGY
A pointed, elevated, and detached mass of rock formed by erosion, such as an aiguille.
HYDROLOGY
A long, slender snow crystal that is at least five times as long as it is broad.
MINERALOGY
A needle-shaped or acicular mineral crystal.
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