bicone type rolling cutter bit 双圆锥齿轮钻头
rolling -cutter reamer 滚动牙轮式扩眼器
rolling cutter bit 牙轮钻头
rolling reamer cutter 滚子式扩眼器切刀
rolling g cutter 滚轮钻头
How to control the normal stress between sealing faces is a critical factor while using metal face seals for rolling cutter rock bits.
在牙轮钻头中成功应用单金属浮动金属密封结构的关键在于控制密封端面之间的接触压力。
The structure and material of rolling cutter, the corresponding heat treatment, the edge grinding technology and the machine structure have been improved and renovated.
研制了卷装背心袋式塑料制袋机用新型滚刀，在刀具结构、材料、热处理工艺和刃磨技术等方面进行了全面的改进和更新。
The new rolling cutter for the recoiling vest-like plastic bag manufacturing device is developed, the structure, material, heat treatment process and edge grinding techniques are improved.
研制了卷装背心袋式塑料制袋机用新型滚刀，在刀具结构、材料、热处理工艺和刃磨技术等方面进行了全面的改进和更新。
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