In plastic or hard plastic clay, or water content smaller sand application microgroove blade drill, slowly and evenly drilling.
在可塑或硬塑粘土中，或含水量较小的砂土中应用密纹叶片钻杆，缓慢地均匀地钻进。
Pansteel Blast Furnace used simply electric taphole drill for a long time, which cannot apply to higher smelting intensity and the new clay gun.
攀钢高炉炉前开铁口设备一直使用简易的电动开铁口机，已不适应高炉高强度冶炼和铁口新型炮泥的要求。
Pansteel Blast Furnace used simply electric taphole drill for a long time, which cannot apply to higher smelting intensity and the new clay gun.
攀钢高炉炉前开铁口设备一直使用简易的电动开铁口机，已不适应高炉高强度冶炼和铁口新型炮泥的要求。
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