The present invention relates to compounds and their uses, particularly in the pharmaceutical industry. The bag, which may be formed by a thermoforming process, includes a thickened portion as part of a peripheral flange that terminates in a bulb. Then, locating the textual information in each frame of the video sequence to form a stack of text arrays, each array containing data representing substantially only the textual information. The first heat exchanger is positioned in a high pressure side of the fluid circuit and the second heat exchanger is positioned in a low pressure side of the fluid circuit. A series of hollow-shell road wheels assembled in a back-to-back configuration support the tracked-vehicle and act as guides for the track of the tracked-vehicle. The clutch apparatus has a solenoid unit for supporting the housing and is capable of being selectively onoff-controlled.