Reference website: after www.hydlxx.com the Tai'an Survey and Mapping Daochui, hole, steel pipe standard, steel and aluminum tube construction and laying of the bimetallic standard pore-installation: Daochui hole, steel pipe standard, steel and aluminum tube bi-metal standard should be formed at the construction site . In accordance with the design coordinates, elevation positioning of drill holes, loft. Rig in place, should be carefully corrected. Correction install fixed rig, the spindle must be strictly vertical drill hole positioning accuracy to meet the design requirements. Each drilling construction process footage of 1 m to 2m, using the inverted plumb floating body group with the elastic guide in drilling vertical degree detection, in order to control the quality of drilling, and then guide the adjustment of drilling operation. The Daochui drilling vertical should meet after the completion of the protective tube installation buried, the effective aperture of the protection tube must be greater than 100mm. Steel standard, steel, aluminum, bi-metal standard drilling verticality should meet the requirements of the protection tube installation buried. Tel 0538 -2110257 18653822288