| perfect |
Flower with both stamens and a pistil.
출처: www.msu.edu/user/linnellw/gloss.htm
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| perfluorocarbons |
A group of human-made chemicals composed of carbon and fluorine only. These chemicals (predominantly CF4 and C2F6 ) were introduced as alternatives, along with hydrofluorocarbons, to the ozone depleting substances. In addition, PFCs are emitted as by-products of industrial processes and are also used in manufacturing. PFCs do not harm the stratospheric ozone layer, but they are powerful greenhouse gases
출처: ilrdss.sws.uiuc.edu/glossary/glossary_browseresult...
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| perforation |
a hole or series of holes; the state or process of being perforated
출처: ipm.ncsu.edu/AG271/glossary.html
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| perforation |
Refers to a series of small cuts made in a material to assist tearing or folding.
출처: www.compulabel.com/index.asp
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| perforation |
A method of making holes through the casing opposite the producing formation to allow the oil or gas to flow into the well. See the Gun perforation.
출처: www.maverickenergy.com/lexicon4.htm
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