The results show that the test error of sample A with large angle coefficient of holebottom is under 5%, and will become smaller with the increase of furnace temperature;
结果表明，孔底角度系数较大的试样A的检测误差<5%，并且随着炉膛温度的提高，其检测精度也随之提高；
2
When the inclination angle of a side nozzle is 0, 30,45 and 60 degrees, the eddying flow of the bottomhole vortex device will cause rotation at the bottom hole, affecting on the jet from bit nozzles.
A circular hole equals to the cylinder of the jointing component and gaps through which the nylon can fall down are reserved in the vicinity of the opposite Angle at the bottom of the flat triangle.