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[link widoczny dla zalogowanych] The reason why the base sewer drains dug so deep, the main purpose is to hope in the face of artillery and warplanes bombing, in addition to tens of centimeters thick that layer to provide [link widoczny dla zalogowanych] security protection sewer vault, you can also use its upper five meters thick overburden, providing another layer of protection to ensure the future safety of persons sheltering in them. In order to solve a large number of personnel after entering the sewer air circulation problems, nike shoes in the planning, it is set every ten meters or so there is a road drain, high- intensive road drain, can protect the entire sewer air circulation to meet the which avoid the possible bombing of respiratory needs of the people.
An Yi a superficial,[link widoczny dla zalogowanych], not all the insider told the Chiang Kai-shek. According to the city sewer planning, in addition to the sewer for maintenance personnel on both sides of the passage of one five -meter-wide sidewalk outside escape the bombing of civilians in wartime are available in about one kilometer intervals, also has a connected thereto, and have separate entrances the shelter. All these underground shelters usually in a closed state, or used as a warehouse. In wartime, the individual and the sewer hub together, constitute a temporary underground command post, troops stations, hospitals and the like.
An Yi face became serious : [link widoczny dla zalogowanych] Sewer overall height eleven meters, all buildings and roads built in the city, between the bottom of the entire city formed a large pet networks, channels set up on both sides of a stone railing and canal dredging anchor boat and moveable row of silt drainage equipment. The different sections of the sewer, respectively, with lift pumping station, pumping stations, intercepting debris gates, cleaning stains gates, hydraulic washing equipment and other facilities. Dredgers primarily for salvage debris, dredge sweep barrier, repair equipment to use, in order to ensure smooth drainage sewer, to keep the city sewage and surface water area, the inflow at the outlet of each building sewage treatment plants, purification and timely reduction.
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