备用二级头呼吸器 bèiyòng'èrjítóuhūxīqì octopus Definitions Defs Origin Strokes Stroke Words Sentences Sents 备用二级头呼吸器 備用二級頭呼吸器 bèiyòng'èrjítóuhūxīqì octopus (scuba diving) a backup regulator or secondary air source used for emergencies
备用二级头呼吸器 備用二級頭呼吸器 bèiyòng'èrjítóuhūxīqì octopus (scuba diving) a backup regulator or secondary air source used for emergencies
