Some roof gutter exchange downspouts for baffle type designs break up the stream of drained water, so that it does not erode the ground below.

The technology with the caterpillar type baffle dosage bunker to control the nutrient content of BB fertilizer (taking an example to illustrate) and its indexes at Heihua Group Corp. Are introduced.

Spiral baffle heat exchanger baffle type and feature are introduced, and the calculation formula of all geometry dimension of spiral baffle are given.