self-contained breathing apparatus
/ˈsɛlfkəntˈeɪnd ˈbɹiːðɪŋ ˌapəɹˈeɪtəs/
n
English · self-contained breathing apparatus中文 · 自给式呼吸器Español · aparato de respiración autónomoFrançais · appareil de protection respiratoire
意味：Device that protects against inhaling toxic gas, smoke, dust, etc. respiratory system