free-fall time

常见例句

How much free-fall time is safe?
有多少自由下落的时间是安全的？
blog.sina.com.cn
It can open the circulation ports directly and quickly, whereas the free-fall opening plug needs longer time waiting for falling.
它可直接打开循环孔，而不像重力塞那样需要较长等待下落时间。
Considering the very short particle residence time in the free-fall reactor, air was directly used as carrier gas to study the fast pyrolysis and sulfur evolution of coal under oxidizing atmosphere.
充分利用煤颗粒在自由落下床反应器中停留时间短的特点，直接用空气做载气，对自由落下床反应器中煤在氧化性气氛下的快速热解行为和硫的变迁进行了研究。

Emergency anti-shorting rules were put in place for a time last fall in financial stocks to stop a trading free fall.
FORBES: Magazine Article