make pipes bi-directional = more close to nature's law of pressure

making pipes bi-directional would be more realistic and would ease game situations, where you have multiple sources and multiple consumers.

Take it as that pipes have valves and someone is controling theirs flow (as it should be). Also bi-directional pipes would definitelly make new complications, not ease the game, because now we have clearly defined what goes where. Also when you have multiple sources, you usually wants to prioritize some of them anyway.

管道应该有单向阀门
The pipeline should have a check valve.

I feel like the valves should be optional - By default, a metal tube does not enforce a specific flow direction.
You can still prioritize certain producers/consumers using the balancers.

In most games of this type and real life instances will have multiple locations feeding the main line that keeps the main line pressurized feeding the multitude in every direction. Would be nice to have added.