| 摘要 |
of Invention The hydraulic rock-crusher combined feed screen, primary and secondary crushing. A double acting swinging beam --3-- has a primary and secondary reduction of 1/20. A mached-split up pressure through hydraulic cylinder --2-- and exciter --5--combine high production, economy of operation and lower costs. A bar screen jaw --7-- in the crushing space is to improve the frozen rock productivity. Crushing-levers --1-- can have a feed bar screen for removal of fine material.
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