falling weight

基本解释

The discovery of the method of using portable falling weight deflectometer and Rayleigh wave satisfy our need.
便携式落锤弯沉仪法和瑞利波法的出现适应了这一需求。
And so they proceeded to invent the verge-and-foliot escapement, using a falling weight as with its Greek antecedents.
于是他们利用希腊早就使用的重锤着手发明了立轴横杆式擒纵机构。
Furthermore, The data of load time histories are measured by Falling Weight Deflectometer(FWD) in situ to calculate the response curves of layered viscoelastic foundation.
在此基础上求解了落锤式弯沉仪（FWD）所记录的荷载作用下的层状粘弹性地基动力响应。

You don't feel any weight because your weight is the opposition you get to falling through the floor; but if the floor is giving way and you're just falling freely, you feel weightless.
你不会感到重力,是因为你的重力在阻碍你穿过地板,如果没有地板,你自由下落,也感觉不到重力
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落锤
The presence of Falling Weight Deflectmeter meets this need.
落锤式弯沉仪的出现适应了这一需要。