An oil extracting apparatus includes a rigid oil adhering ring having a horizontally disposed ring axis and an oil adhering surface surrounding the ring axis, a driving device coupled to the oil adhering ring for driving rotation of the oil adhering ring about the ring axis, an oil scraping unit, and an oil collecting unit. In one embodiment the sensors are mounted on one or more rail trucks that carry the car body. A roller is pivotally mounted at a distal end of the roller support frame. The BUM technology allows for the creation of a succession of layers over the thin film layers.