相关单词近义词 coalpit 煤坑临近词coalbed, coal, coal mine flooding, coalmine' s tunnel, coal oriented city, coalescing element, coal ash viscosity, coal mass strength, Coal series kaolin, coal seam fracture, coal replacing oil, coal stratingraphy相似词coagulation, coal, coal black, coal bunker, coal miner, coal scuttle, coal tar, coal-fired, 返回 coal mine