| parts |
the local environment; "he hasn't been seen around these parts in years"
출처: wordnet.princeton.edu/perl/webwn
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|---|---|
| Partsch's operation |
a technique for marsupialization of dental cyst.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| parts per million |
one part in a million. Abbreviated ppm and commonly used to express defect levels or concentrations. Passivation - a final layer or layers put on semiconductors to protect them against contaminants and mechanical damage.
출처: www.icknowledge.com/glossary/p.html
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| parts per million |
A quality measure of the number of defective items observed or projected out of a population of one million.
출처: www.bridgefieldgroup.com/glos7.htm
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| parts per million |
This is a way of expressing very dilute concentrations of substances. Just as per cent means out of a hundred, so parts per million or ppm means out of a million. Therefore 500,000 ppm is the same as 50 per cent, because 500,000 is half of a million. The concentration of oxygen in unpolluted fresh water is about 8 ppm ?only 8 parts of oxygen for every 1 million parts of other substances.
출처: www.science.org.au/nova/034/034glo.htm
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