coal - measure

• 煤系

coal - measure的用法和样例：

例句

1. The processing techniques of coal series kaolinite are introduced.
   介绍了煤系高岭土的几种深加工利用方法。
2. Abstract There is coalseam methane in coalbed and coal bearing sequences in the study area.
   在煤层和煤系地层中，产生并赋存着煤层气。