qualifying heats meaning in English

及格赛, 预选赛

So , what was it like breaking 9 . 8 in the qualifying heat
资格赛中,你成绩低于9 . 8秒,当时感觉如何？
A thermoacoustically driven pulse tube refrigerator capable of using low - qualified heat source
可利用低品位热源的热声驱动脉管制冷机
Qualified heat recovery rate acquired from the merge equation ' s resolve in terms of the fortran program and the hvac - id graph in the course of the theory calculation . determining the experimental equations applying the ortho imitated experimental design on the basis of the simple spray chamber . the experimental date originated running double - spray chamber ' s entrance and exit air
理论计算中通过编制的fortran程序求解组合方程组，并结合hvac - id图求得符合要求的热回收率，其间试验公式是在单喷水室的基础上采用一次正交回归试验设计得到，试验结果是通过对运行的双喷系统中的室内外空气进出口状态参数进行测定而得到。