Virtual reality, and the time to check, flow well exposed.
虚与实，时间以验之，流蜚不攻自破也。
When the tool is in the open position during descent, a large flow area is exposed and maximizes flow through the tool to decrease cycle time and increase well production.
当该工具处于开启状态时，会形成一个较大的流通面积，可以最大限度地提高流量，减少周期时间，提高生产。
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