热流测量 meaning in English

heat flow measurement
heat flux measurement
heat-flow measurement

Heat flux is difficult to measure especially transient heat flux , which has not been resolved until now
热流测量是热工测量中的难点，特别是瞬态热流的测量是热工测试中一直没有得到解决的问题。
So the research and development of transient heat flux sensor fills the domestic gap of measurement of transient heat flux in some aspects
因此瞬态热流计的研制填补了国内在瞬态热流测量上某些方面的不足。