After coke oven holereaming at Nangang coal gas cleaning system technology of old coke oven is improved, the result shows that the system operation is stabilized.
对南钢焦炉扩孔后原焦炉煤气净化系统工艺进行了改进，系统平稳运行，取得了良好效果。
2
Reaming is one of the finish machining methods of hole.
铰孔是孔的精加工手法之一。
3
It is mainly be used for drilling, reaming, the cutter hole , tapping and so on.