frog rammer

• 跳跃式打夯机,爆炸夯,蛙式打夯机

frog rammer的用法和样例：

例句

1. The foreman asked us to buy frog rammers.
   工头让我们去买蛤蟆夯。
2. This paper presents the construction method of pneumatic rammer piling.
   文章介绍了气动夯锤打桩的施工方法。