All kinds of special pipes and conduits (ditches), ash storage sites, wells, pumping stations, water cooling towers, oil depots, dikes and dams, railways, roads, bridges, docks, fuel loading and unloading equipment, lightening arresters, fire-fighting equ
All kinds of special pipes and conduits (ditches), ash storage sites, wells, pumping stations, water cooling towers, oil depots, dikes and dams, railways, roads, bridges, docks, fuel loading and unloading equipment, lightening arresters, fire-fighting equ
（三）、水力发电厂使用的水库、大坝、取水口、引水隧洞（含支洞口）、引水渠道、调压井（塔）、露天高压管道、厂房、尾水渠、厂房与大坝间的通讯设施及附属设施。