| 摘要 |
A throttling device has a body in which elastic stretching insert is hermetically fixed, control elements are arranged, and control handle. On four sides of the body that is arranged with cylindrical cross section on the outer surface symmetrically with respect to axis guide elements are installed, with control elements that look like hollow cones, with tops arranged at angle 90°, those gradually go to hollow cylinders and form a continuous construction. The control elements are fixed on control screws that are attached to the upper part of the guide elements, in the upper part of control screws grooves are provided, in the lower section of control screws stoppers are provided, control handles are arranged on each of control screws, with possibility of rotation of those, there cuts are provided. |
