A press system having a frame, a slide, a first die element on the slide, and a knockout assembly. Each blade has pitch bearings including two or more bearing rings, and pitch controlling means for pitching the blades by means of the bearings. A corresponding clothing clip and a corresponding pressing tool are furthermore proposed. This invention also relates to potato plants and plant parts derived from potato cultivar J55, to methods for producing other potato plants or plant parts derived from potato cultivar J55 and to the potato plants and their parts derived from use of those methods. The novel crystalline form of cabazitaxel according to the invention has good stability and good solubility in commonly used solvents, and is easy to be preserved and is stable under treatment during preparation of dosage forms, thus could be used for the preparation of a medicament for treating prostate cancer.