smoke-shade

English

smoke-shade (plural smoke-shades)

(archaic) A tint measured from 0 to 10 on a scale for comparing different varieties of coal according to the amount of unburnt carbon in their smoke.

单词	smoke-shade
释义	smoke-shade English Noun smoke-shade (plural smoke-shades) (archaic) A tint measured from 0 to 10 on a scale for comparing different varieties of coal according to the amount of unburnt carbon in their smoke.
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