Telescopic surveying-rod level, with withdrawable spirit levels for vertical-horizontal measuring

摘要

The level is made of aluminium and has a basic length of 2.5 metre, which can be drawn out on both sides a distance of 1 m. to cover a length measurement of 2.5 to 4.5 m with a spirit level. With the drawing out at one or both sides, the measuring sides of the spirit level move away from each other on level, ensuring a flexible measuring of different lengths with only one spirit level. The telescoping ability, of the spirit levels maintaining the level at the upper and lower sides, is protected. Different lengths can be levelled using the same spirit level.