使用液氮的过程不要求有汽化器和压力控制管。
Processes that use nitrogen as a liquid do not require the vaporizers and pressure control manifold.
,然后用液氮把氢气降温到,然后就可以使用这个氢气了，想要用氢气来做焦耳-汤姆孙实验。
Then you take hydrogen you cool it would liquid nitrogen to 77, then you can use your hydrogen gas.
液氮管路活接头必须具有空间尺寸小、安装拆卸方便、使用周期长的特点。
The liquid nitrogen union must have several advantages, such as small volume, easy to assemble and disassemble, long life, etc.
通过使用本实验室设计的低温拉伸夹具，测定了纳米二氧化硅改性环氧树脂复合材料在室温和液氮（77K）环境下的拉伸强度、弹性模量和延伸率。
Measurement of tensile strength , modulus and strain of nanometer SiO2/epoxy composite materials was conducted using self-designed tensile testing jigs at room temperature and 77K.
然后，使用导管的尖端在这些位置上施加能量(用于加热的射频或者用于冻结的液氮)。
The tip of a catheter is then used to apply energy (either radiofrequency to heat or liquid nitrogen to freeze) at these locations.
然后，使用导管的尖端在这些位置上施加能量(用于加热的射频或者用于冻结的液氮)。
The tip of a catheter is then used to apply energy (either radiofrequency to heat or liquid nitrogen to freeze) at these locations.
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