1)VHC Vacuum Exhaust Heat Control Valve,真空排气热控制阀2)hot air control valve,热空气控制阀3)VACVV-T Thermactor Vacuum and Vent Control Valve,热反应真空与通气控制阀4)A/CL-VCV Air Cleaner Vacuum Control Valve,空气滤清器真空控制阀5)TVV.TV Thermal Vacuum Valve,热控真空阀6)VCV Vacuum Control Valve,真空控制阀