| 摘要 |
The invention relates to appliance for implementation of building operations that includes support, slide for instrument holding installed on front face of the support with possibility of displacement in long direction, at least one laid longitudinally support drive chain for trolley and at least one drive pinion installed on slide with possibility of rotation, this is in engagement with drive chain. Drive chain and drive pinion are placed in front of front face of support, at that drive chain goes round the pinion at opposite with respect to support side with formation of pressing force in direction of front face of support. |
