| 摘要 |
An improved rotary shearing apparatus for cutting a rapidly moving body including rotatable blades which may be inserted into a cutting position and withdrawn therefrom, positioning means for inserting or withdrawing the blades into or out of cutting position, and automatic switches and circuitry capable of causing insertion of the blades and their withdrawal within one rotation of the blades, so that the blades will sever the rapidly moving body with a single clean cut and without disturbing its rapid movement.
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