... 100qf less than· heat-resistant + 90 °C environment in place 120 hours, remove and in the atmosphere after 24 hours, put ... project determination standards· hardy performance: in - 20 °C environment placed 120 hours, remove and in the atmosphere after 24 hours, put ... periodic testing: - 20 °C : 60 minutes, mobile: 60 minutes, 80 °C : 60 minutes, mobile: 60 minutes, - 20 °C remove in the atmosphere after ...