Multi-stage type expansion and contraction standards

摘要

Topic As for this device, in order not to cause electric shock concerning the high tension wire of the utility pole where the standards are inspected ones, there are times when it develops & offers the standards of the structure which can assure the safety of the worker.SolutionsIn the multi-stage type expansion and contraction standards of metal make such as aluminum, the standards which are categorized to the top, or Chubu of the standards itself (1a) insulating means it is something which is constituted from the multi-stage type expansion and contraction standards which feature the thing which (2) is administered. Furthermore, insulating means (2), the standards which in the standards which are categorized to top or Chubu were formed with insulating material (1 ') it provides, or the standards (1) the insulating film (2a) with it is something canning on the surface, as for number of standards, there are no times when it is limited to 7, number is something which differs from our zu with the height of the utility pole of the investigation target. Choice figure Drawing 1