| 摘要 |
A spring prismatic key is arranged with hollow section in shape concentric to outer contour and comprises two and more similar in form through different in dimensions keys with hollow sections in form concentric to outer contour assembled in such way that the smallest key is fit to a larger key, and those two to still larger key, and so on till coming to overall dimensions b, h and l. The outer dimensions of specific keys are equal or some larger compared to dimensions of hollow sections where those are installed. |
