A process for the hydrogenation of a polyunsaturated oil, wherein said oil is reacted with hydrogen in the presence of a copper-chromium containing catalyst at a temperature of from about 200 to 300 C. The control includes a passage connecting internal volumes of the device, the passage being substantially shorter than an acoustic wavelength of the device; and a check valve in the passage for controlling fluid communication between the internal volumes, the check valve having an opening pressure not less than approximately 20% of a maximum pressure differential of the device at a maximum stroke. In many exemplary embodiments, receiving a domain state object includes receiving a signal to download the domain state object from a mobile sensor, and downloading the domain state object from the mobile sensor. Automatic entry and release are provided by a selected interchangeable spring element within the base biasing the head to the locked position but permitting movement to the unlocked position when torque is applied by engagement of the container with a cam surface on the head. The speed controller includes a monitoring module that is designed to detect, by reference to the locating data, a situation in which objects not detected by the locating system are within close range and, in this situation, issue a takeover prompt to the driver. A film winding shaft is provided vertically on the other side of the main body to wind the film from the film unwinding roll.