这食物保存在绝对真空中。
动态流量法超高真空标准装置是用于校准真空规的绝对真空计量标准。
The dynamic flow method UHV standard apparatus is an absolute vacuum standard for vacuum gauge calibration.
当绝对真空度一定时,A356铝合金丝材的吸铸长度随充型温度的升高而增大。
With a fixed the absolute vacuum, the length of the A356 aluminum alloy wire is increased with the increase of the filling temperature.
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