| ppb |
One ppb is comparable to one kernel of corn in a filled, 45-foot silo, 16 feet in diameter. A part per billion is roughly equivalent to one-thousandth teaspoon of water in a 21-foot diameter, 4-foot deep swimming pool.
출처: www.egr.msu.edu/tosc/glossary.shtml
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| PPE |
Safety devices or safeguards worn by workers to protect against environmental hazards. PPE includes helmets, safety goggles, hearing protectors, face shields, respirators, arm guards, smocks, gloves, and safety boots.
출처: www.hfeconsulting.com/Expert_Witness/GlossaryLtoR....
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| PP |
(and then the number) for page ../pp. For pages - to-
출처: www.ioba.org/terms.html
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| PP |
Progressive proof. A series of proofs intended to illustrate the image development of the completed print showing each color or element as added one by one.
출처: www.nga.gov/gemini/glossary5.htm
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| ppt |
A concentration at which one unit is contained in a total of one thousand units. Seawater (35 ppt) is normally expressed in ppt.
출처: ag.ansc.purdue.edu/courses/aq448/glossary.htm
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