Avoid the quick changes of casting structure, use fillet radius on internal Angle when possible, which is no less than R0.3.

铸件结构应避免急剧变化，尽可能避免尖角，圆角应达到R0.3以上。

youdao

You update your internal picture, perhaps changing the angle of some of a line here or there, or adding another element.

FORBES: Your Brain Was Made For Visual Modeling

By varying the angle and direction of SAWs relative to the droplet, the internal streams can be made to flow in just about any direction.

ECONOMIST: Acoustic microfluidics