An indented profile creating a larger annular area causes the fluid flow rate to drop and allows debris to drop into a basket or receptacle located at the base of the tool.

具有较大环形面积的凹纹型面使流体流量下降，并使碎片落入位于工具底部的篮或接受器内。

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Likewise, the higher the data rate, the more base stations are needed to cover the same area.

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