I assume you transport Oil and Water to make your Oil/chemical industry center. I would solve it other way. Make solid fuel from oil, then add a refuel inserter to all(both) train stations there. No need for logic gates at all. As soon as they arrive to unload they will be stufffed by fuel to the r...

For English-speaking comrades. Для англоговорящих камрадов. Sup, anonymous that can help in the logic. There is one algorithm. There is a place with loading (point A) and a place with unloading (point B). It is necessary to automate the refueling process. How can I make sure that while traveling fr...