heavy hammer的用法和樣例：
例句
- Under the impact of a large hammer, a high signal noise ratio of the force and velocity can be acquired in the high-strain dynamic testing.
高應變動(dòng)力試樁法采用數噸重錘錘擊，同時(shí)實(shí)測了樁頂的力信號和速度信號，具有很高的信噪比。 - Free falling heavy rammer was used in former piling constructions, but the piling depth and pile pipe diameter were comparatively small.
在以往的施工中采用重錘下落打樁，打樁的深度和樁管的直徑都比較小。
