| 摘要 |
FIELD: crushing and reducing minerals. SUBSTANCE: crusher has crushing chamber with grate, conveyer communicating with crushing chamber, and conveyer casing accommodating valve in its bottom part; casing is contracting in direction of valve; crusher is equipped with additional ducts providing communication between crushing chamber and conveyer casing interior; holes of these ducts are disposed below loading part of conveyer rising branch; outlet hole of valve has oblong cross-section. EFFECT: enhanced service life of conveyer. 1 dwg
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