词汇	broken coal
释义	broken coal 破碎煤体
随便看	main amplifier circuit main amplifier input panel main amplifying circuit main analysis main analytic approach main anchor main and annex building main and assisting teaching main and auxiliaries main and auxiliary battery main and auxiliary lines main and auxiliary shaft hoist main and backup channel Main and branch library system main and by-product production Main and impurities elements main and most main and retrun cam main and return cam main-and-return cam main and return cm main and secondary main and second bridge main and side beams Main and slope hole