The staircase creaked a bit then collapsed, making a hole where they were standing and quickly, the potion began to drip from the lops to the side and to the bottom.

楼梯裂了口，紧接着就塌了，在他们站的地方弄了个窟窿——那蓝色药水从边边角角往下滴。

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When the inclination angle of a side nozzle is 0, 30,45 and 60 degrees, the eddying flow of the bottom hole vortex device will cause rotation at the bottom hole, affecting on the jet from bit nozzles.

侧喷嘴倾斜角度在0度、30度、45度和60度情况下，由于井底涡旋器的旋流作用，导致井底产生旋转，对钻头喷嘴射流产生了影响，以致在45度时出现压力损失最小的情况；

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