词汇	drilling in coal
释义	drilling in coal 煤层钻进
随便看	through circulation dryer throughcirculation drying through circulation drying through cleaning through clearing through coal through cock Through coil technique Through-coil technique Through comparison,the effect of layout of brac… throughcomposed through composed through-composed through-composeds through-composed song through concentration through condenser through-conductor type through connected circuit through connection through-connection through connection delay through connection filter through connection of groups through connection of voice frequency