| ppm |
A volume unit of measurement; the number of parts of a substance in a million parts of another substance. For example, 10 ppm nitrate in water means 10 parts of nitrate in a million parts of water.
출처: www.soil.ncsu.edu/publications/BMPs/glossary.html
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|---|---|
| PP |
Polyolefin. Isotactic polypropylene (PP) has a less polar backbone with the repeating unit: -CH 2 -CH(CH 3 )- and a melting temperature of approximatly 160
출처: www.specialchem4polymers.com/resources/glossary/in...
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| PP |
push-pull.
출처: www.aikenamps.com/AmpTerms.html
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| ppb |
the number of "parts" by weight of a substance per billion parts of water. Used to measure extremely small concentrations. One microgram per liter of water is approximately equal to a ppb.
출처: mvhs1.mbhs.edu/riverweb/glossary.html
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| PP |
The lowest value of oxidizing potential at which pits nucleate and grow. It is dependent on the test method used.
출처: www.hghouston.com/c.html
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