无论淬火介质怎么冷，如果在大工件中的热量不能比特定的临界速率更快散发，那它内部硬度就会受到明确限制。
No matter how cool the quenching medium may be, if the heat inside a large piece cannot escape faster than a certain critical rate, there is a definite limit to the inside hardness.
随剪切速率的增加，压力振荡的振幅减小，而滑移速率、临界外推滑移长度及振荡频率均有提高。
As the shear rate rises, the amplitude of pressure oscillation reduces, whereas the slide velocity, critical slide length and the frequency increase.
确定了在落管中形成玻璃的临界冷却速率。
The critical cooling rate for the glass formation in the tube was determined.
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