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Beijing Chenggong Mechanical Technology Research Institute is located in the Party School of Fengtai District, Beijing. It is a strong innovative enterprise integrating research, development, production and sales of wall whitewashing machine, mortar coating machine, putty coating machine and grinding machine…
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beijing chenggong mechanical technology research institute is located in the party school of fengtai district, beijing. it is a strong innovative enterprise integrating research, development, production and sales of wall whitewashing machine, mortar coating machine, putty coating machine and grinding machine.
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Apr 04, 2018· With cement, bentonite, water glass, J85 accelerator, retarder and water as raw materials, a new composite grouting material used to seal groundwater inflow and reinforce wall rock in deep …Author: Zhang Jinpeng, Liu Limin, Zhang Futao, Cao Junzhi
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PDF | This paper reports on a repair work which has recently been conducted for a metro tunnel in Hefei city, China. The tunnel has been originally constructed using shield method where …
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