环境试验的时间问题

Thermal shock that can be expected in the vehicle environment is simulated by the rate of change shown on the
recommended thermal shock profile portrayed in Figure 2C usually specified as no greater than 5 min. The thermal
shock test should begin with a 2 h presoak at –40 °C/–40 °F. The test item should be transferred to the hot chamber
(85 °C/185 °F) where it should remain for 2 h, then transferred back to the cold chamber (–40 °C/–40 °F) where it should
remain for an additional 2 h. Each transfer should be accomplished in 1 min or less. The 2 h dwell in the hot chamber
and 2 h dwell in the cold chamber constitute one thermal shock cycle.
请问 5 min 和1 min  分别指哪个过程的时间