It is mainly be used for drilling, reaming, the cutter hole, tapping and so on.
主要用来进行钻孔，扩孔，工科论文绞孔，攻丝等。
Actualization of Dust Collection Design of Tapping Hole and Hot Metal Pitcher of BF.
高炉铁口和铁水罐除尘的实施。
EXTENDING LIFE OF STEEL TAPPING HOLE OF CONVERTER AND STEEL TAPPING BY SLAG SKIMMING
转炉出钢口长寿化与挡渣出钢
Production process optimization of monolithic magnesia carbon tapping hole for converter
镁炭质整体出钢口的生产工艺优化
Enhancing Position Accuracy of Thread Hole by Improving Tapping Accessories of Connecting Bar
改进连杆攻丝辅具提高螺纹孔位置精度
At the end of cooking, the cook closed the tapping hole for ashes of the stove to dampen down the fire.
做完饭，厨师把出灰口关上，为使火势减弱。
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