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单词 egg coal
释义

WordReference Random House Unabridged Dictionary of American English © 2024
egg coal′, 
    1. Mininganthracite in sizes ranging from 3¼ to 2716 in. (8 to 6 cm), intermediate between broken coal and stove coal.
    2. Miningbituminous coal in sizes ranging from 4 to 1½ in. (10 to 4 cm).
    • 1850–55, American.

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