The important machinery of the schoolwork soil compaction is the vibroll whose superiority makes it take 90% of the market of road roller.
实作业
械就是振动路，振动路实优越性使其占路市场90%
。
The important machinery of the schoolwork soil compaction is the vibroll whose superiority makes it take 90% of the market of road roller.
实作业械就是振动路，振动路实优越性使其占路市场90%。
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