\laptop\sequeris\airLogic.txt flip flop, pneumatic: https://www.hydraulicspneumatics.com/technologies/other-technologies/article/21883874/book-2-chapter-2-air-logic-circuits no danger from explosion or electrical shock is possible even in these atmospheres ANSI logic symbol and ISO graphic symbol Figure 2-5: "Flip flop" element double piloted 5-way valves second signal on the directional valve’s opposite pilot port to shift it back stay in their last shifted position even with no air supply flip flop electrical: four DPDT flip flop \laptop\proView\relays.txt