| 摘要 |
A vibratory roller with an earth compacting drum having an axially balanced shaft which is journaled in the drum and power driven for rotation relative to the drum. The shaft carries a hollow chamber which is offset eccentrically from the axis thereof and which extends substantially the entire length of the shaft. Means are provided for admitting liquid to and discharging it from the chamber so that the amplitude of vibration of the shaft might be varied at any selected speed of rotation of the shaft.
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