7 - 1. SECTION 7. EXCAVATION AND BACKFILL FOR PIPELINES. 7.1 GENERAL. The work covered by this specification consists of furnishing all labor, tools, materials, equipment, and performance of all operations in connection with the excavation, trenching, and. backfilling for underground pipelines and appurtenances.
Originally, the term was used to mean government by a body of priests. Currently, a hierarchy is used to denote any body of individuals arranged or classified according to capacity, authority, position, or rank.
A hierarchy is an organization of items into different levels of relative importance. Visual hierarchy is naturally enough creating this organization and prioritization visually.isual hierarchies create centers of interest on your page, communicate additional meaning through convention and repetition, highlight actions you want your visitors to take, and establish patterns of movement and flow.