spreader adjustment screw
/ˈspɹɛdə/
n
English · spreader adjustment screw中文 · 喷幅调节螺钉Español · válvula de ajusteFrançais · soupape de réglage du fluide
意味：Movable part whose opening is controlled by a screw that controls the volume of air pushed into the air cap, thereby defining the size and shape of the paint jet.