graded coal

矿业工程专业词汇英语翻译(D-H) -亿城英语 ... grade up 上坡 graded coal 过筛煤 graded crushing 分段破碎 ...

coal的翻译中文意思-在线英汉词典 ... glance coal 亮煤 graded coal 筛过煤 hard coal 硬煤， 无烟煤 ...

机械专业英语词汇-机械资讯-马棚网... ... graded cable 分层绝缘电缆 graded coal 分级煤 graded coil 分段线圈 ...