| 摘要 |
The tooth for destruction of frozen ground has tail element, executive section, the front cutting edge, the front cutting surface, the back cutting flat surface, depression at the front cutting surface and side surfaces of the tooth. The depression at the front cutting surface is in shape of upturned four-face obelisk. The front surface of the obelisk is parallel to the back cutting surface of the tooth. The side surfaces of the obelisk are inclined at angle to the frontal surface of the obelisk symmetrically with respect to the long plane of symmetry of the tooth, this forms with the outer side surfaces of the tooth the side cutting edges, the plane of cut of the obelisk is parallel to those cutting edges. The back side of the obelisk connects the plane of the cut of the obelisk and the tail element.
|
