| 摘要 |
A positioning element consists of mean for holding object of positioning that is arranged with possibility of holding between opposite support surfaces and with possibility to hold the object of positioning, a position indicator that comprises a laser arranged with possibility of determination of plane at required angle to horizon, and a pointer for laser radiation that is placed either on the object of positioning and/or on objects that are permanently connected to it, and/or on mean for holding object of positioning and/or means connected to it. |
