free-fall time

常见例句

How much free-fall time is safe?
有多少自由下落的時間是安全的？
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It can open the circulation ports directly and quickly, whereas the free-fall opening plug needs longer time waiting for falling.
它可直接打開循環孔，而不像重力塞那樣需要較長等待下落時間。
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.
充分利用煤顆粒在自由落下牀反應器中停畱時間短的特點，直接用空氣做載氣，對自由落下牀反應器中煤在氧化性氣氛下的快速熱解行爲和硫的變遷進行了研究。

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