There is a five second activity duration to account for the serial transfer of data to the printer.
需要用五秒钟的活动持续时间来安排到打印机有序传输数据。
Isentropic light piston wind tunnel is a kind of short working duration tunnel. It is adequate to be used for the research work of instantaneous heat transfer measurement.
等熵轻质活塞风洞是一种工作时间很短的风洞，作为气源适合于瞬时热传导测量技术的研究工作。
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