n. hards ; anthracite
misc. hard coal ; strong coal
·2,447,543篇论文数据，部分数据来源于NoteExpress
窗框和门框用硬煤色上漆，隐藏在厚重的石头墙内。
Windows and door frames were painted in anthracite colour and were hidden in the thickness of the heavy stones walls.
youdao
硬煤为烟煤、无烟煤的统称，指恒湿无灰基高位发热量大于或等于24MJ/kg的煤。黑色有强光泽，以指摩擦不致沾污，比重在1.7以上。
详细内容
应用推荐
模块上移
模块下移
不移动