Kossel effector

fanduct for fullbody effector which designed by kirill91
smaller one.
原版太大了，和加热棒的线有干涉。勉强安装的话，加热棒可能会融化出风口。
two edition:
original edition：three fans cooling both Extrusion head and cooler

mine edition：two fan for cooler，one for Extrusion head。