The special advantage of this roller is of high compaction efficiency, but its self moving speed is not stable.
它的主要特点是压实效率高，但自行速度还不稳定。
The YZ30 type vibration roller is a kind of super-tonnage and high-technology product with the features of fully-hydraulic all-wheel driving and self-moving.
YZ30型全液压双驱自行式振动压路机是一种超大吨位、高技术性能的振动压路机。
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