| 摘要 |
The massive central portion of the knife is formed with an opening of substantially rectangular shape for inserting a boss of square shape integral with a support-washer in turn formed with an opening the shape of which is identical to that of the machine shaft. The boss has an eccentric hole for cooperating with a finger of a stabilizer holding washer provided with a sleeve on which comes the balancing washer of circular shape but having in its center a recess of oblong shape.
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