On the similarity of drain sludge inorganic numerator composition and clay pipe raw material in city solid waste,the production process course of drain sludge plunging into carbide furnace as clay pipe raw material is studied and developed.

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After studying many domestic and abroad papers, the paper follows the recent study of optimal design and organization of gathering pipeline system. According to working condition of natural gas gathering pipeline system in west part of Sichuan.Based on topology, geography conditions of the gas field and different exploitive phase establishing optimal structure parameter mathematical models of pipe network. The object of models is net present investment value of pipe network.

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It can compensate the groundwork sinkage and convenient the pipe connection. It is the indispensable automatically compensating device in pipe system of building material, metallurgy, mining, oil, power industries etc.

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Because the pipe and soil are two kinds of different materials, the effect of interface is considered by establishing the pipe-soil contact pair prescribed in the program.

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ABSTRACT The relative response of a tank's soil foundation and a pipe conveying fluid in earthquake would lead to the broken of the pipe wh...

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