tap and drill gage 丝锥及钻头规
Drill And Steel Wire Gage 钻径及钢丝规
drill bit gage loss 钻头直径磨损量
drill angle gage 钻头角度规
drill point gage [机] 磨钻规
drill pipe gage 钻杆螺纹规
drill l angle gage 钻头角度规
By changing the nozzle inlet pressure, drill gage width, nozzle diameter factors, to study the changes in these flow fields.
通过改变喷嘴入口压力、钻头保径宽度、喷嘴直径等影响因素，来研究井底流场的变化。
The overflow tank level and the speed of both the role of Chip can be changed by changing the factors such as the nozzle inlet pressure, drill gage width, nozzle diameter of the PDC bit.
改变喷嘴入口压力、钻头保径宽度、喷嘴直径等影响因素对改变井底漫流层和排屑槽内的速度都有作用；
Its main functions are maintaining borehole gage, improving drill string stability and protecting lower drill string from excessive wear.
其重要作用是保持钻头尺寸符合标准，提高钻杆稳定性，避免钻杆下部过于磨损。
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