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1·Depressed trough, manhole edges and other places where the roller can not reach shall be compacted with frog rammer.

在压路机不能达到的路槽和检查井边缘，采用蛙式打夯机夯实。

2·The backfill shall be transported with machine and rammed with a frog rammer or a vertical rammer, or rammed with a roller in case of allowable situation.

回填料采用机械运输，夯实采用蛙式夯机或立式夯机进行夯压，允许的情况下采用碾压机进行压实。

3·In this paper, the nonlinear dynamics of Selfpropelled machines with rocked impact, taking Frog rammer which was first devised in our country as an example, is studied.

本文以我国首创的蛙式打夯机为例，对自行式摆动冲击机构的非线性动力学进行了研究。