采煤工作面支护 meaning in English
coalface support
Examples
- The support power of the trend longwall coal face
走向长壁高档采煤工作面支护力 - Graphical symbols for use in technical documentation of coal mine machinery - graphical symbols for coal face support machinery
煤矿机械技术文件用图形符号采煤工作面支护机械图形符号