一级减压器
/ɹɪfjˈuːlɪŋ dɪvˈaɪs/
n
English: regulator first stage · 一级减压器
English · regulator first stageEspañol · regulador de la 1ª etapa de descompresiónFrançais · détendeur premier étage
释义：Apparatus attached to the cylinder valve that lowers the air pressure coming from the cylinder to an intermediate value (medium pressure).