与"coal bed"相近的词条

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• Coakley's antrum trocar
• Coakley's operation
• Coakley's tonsil seizing forceps
• COAL
• coal ball、coal-ball
• coal bed
• coal-black
• coal desulfurization
• coal dust
• coal dust deposition
• coal-face
• coal factor
• coal gas
• Coal-gas maker
• coal heaver
• coal hod

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