| http://www.w3.org/ns/prov#value | - In this conventional mixing device, raw materials such as water and cement are admitted oneinto either end portion of a mixing drum and forcibly introduced into a pressure chamber located at the center of the mixing drum by driving a screw to mingle the raw materials and obtain cement paste, and then, the cement paste thus obtained is fed outat a high rate of speed through a contracted path to imp
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