runner head

However, for bulb turbine, the discharge is large, the number of runner blades is less, the total area is small, cavitation coefficient is large, Intensity condition is bad, as a result, the application head is limited.

但由于贯流式水轮机转轮叶片数少，叶片总面积少，而过流量又较大，气蚀系数大，且叶片强度条件差，故其适用水头是有限的。

A 3D FE model of double plex tread extruder head was established by selecting proper unit form properly dividing network units to obtain and analyze the pressure profile in head runner under a certain working conditions.

通过选取合适的单元形式及恰当的划分网格单元，建立胎面双复合挤出机头的三维有限元模型，得到在一定工艺条件下机头内部流道的压力分布情况并分析其原因。

Gralg is a slow runner, but he head start on others so he race.

格莱拉是一个跑的很慢的人, 可是他总是先人一步出发,所以应的人总是他.

And suddenly Hassan's voice whispered in my head:_For you, a thousand times over_. Hassan the harelipped kite runner.

那一刻，哈桑的声音在我的脑中低语：为了你，千万遍，长着兔唇的追风筝的哈桑。

The feeding head shape of a die and a streamlined sprue runner were designed after an analysis on the cross sectional shape and the extrusion forming ability of PA66 material.

通过对异型材截面形状及原材料挤出成型性能分析，设计了正确的口模形状及合理的流线形流道；