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english degree
释义
English degree
English degree
[
′iŋ·glish di‚grē
]
(chemistry)
A unit of water hardness, equal to 1 part calcium carbonate to 70,000 parts water; equivalent to 1 grain of calcium carbonate per gallon of water. Also known as Clark degree.
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更新时间:2024/11/12 5:53:18