Oil/Fuel Loading and Unloading Station
From Workers & Resources: Soviet Republic Official Wiki
The Oil/Fuel Loading and Unloading Station is the means by which the player can transfer Oil, Fuel, and/or Bitumen to Tankers for transport to other facilities or for export. There are two varieties of this building.
The larger version provides one road connection and two rail connections in addition to two liquid inputs and outputs, which are used to transfer liquid to and from the station.
The smaller version provides a road connection and a single liquid input and output.
Like all buildings, these requires electricity.