smoke shutter

smoke shutter [sməuk ˈʃʌtə]  [smok ˈʃʌtɚ] 

smoke shutter 基本解释
烟障;
smoke shutter 网络解释

1. 烟障:smoke shell ==> 烟雾 | smoke shutter ==> 烟障 | smoke signal ==> 烟幕信号