A tooth is provided for a circular disc felling saw. In addition, the elevator comprises a number of diverting pulleys and a traction sheave driven by a drive motor and mounted in the upper part of the shaft for the transmission of hoisting power, which are disposed in the elevator shaft on the same side of the car, a drive motor arranged to drive one of the diverting pulleys, and a rope system. The featured disk apparatus is designed such that while the disk box needs to be pulled out in order for loading or replacing the disk drive, the pushing mechanism is activated to push the handle. First data is stored in a first part of the sequence and second data is stored in a second part of the sequence. Novel methods for fishing, with a slidable reversibly detachable indicator, at a depth greater than the length of a fishing rod are presented. This makes it possible to reduce problems associated with the lack of selectivity, reduced solubility and other disadvantages of intact drugs.