4、The results show that with the reduction of nozzle diameter, the speed value of the core section is getting bigger, the scattering Angle of jet is getting lower and the focus of jet is getting better.
1、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.
3、有沒有人和我一樣，還在為了一個沒有結果旳結果執着。愛，就是比誰更心軟。我覺得愛情那就是自由，那是呼吸，也是邂逅，那是挽回，是浪漫，是安全感；有時候卻是寂寞，是離開，是祝福，是一場預謀。但更多的是瘋狂，是奮不顧身,是勇於犧牲，不懼任何代價。
2、When the distance of two nozzles was fixed, the offset of impinging stagnation point on the axis increased with the ratio of velocity and the nozzle diameter.
