draught excluder        
noun [ C ] UK uk/ˈdrɑːft ɪkˌskluː.dər/ us/ˈdræft ɪkˌskluː.dɚ/
 (置于门下、长形的)挡风物
a long object that is put against the bottom of a door to stop cold air from entering a room
  (橡胶或塑料制成的门窗)挡风条
material, such as rubber or plastic, that is fixed in a long, thin strip around the edges of doors or windows to stop cold air from entering a room