compressed-air scuba
自戴式压缩空气潜水呼吸器
portable ping air compressor
便携式潜水空气压缩机
compressed air line breathing apparatus
压缩空气管道呼吸装置
Never enter an oxygen-deficient atmosphere (
禁止未戴自给式呼吸器进入缺氧空气（氧含量小于19.5%）。
Closed-circuit Positive Pressure Self-contained Breathing Apparatus Technology of Oxygen
自给闭路式正压氧气呼吸器技术浅议
Divers must breathe compressed air to keep from being crushed by the weight, or pressure, of the surrounding water.
潜水员必须吸入压缩空气才不致受到周围海水压力的伤害。
semiclosed-circuit mixed-gas scuba
自足式半闭路混合气水下呼吸器
A per who comes up for air
一个升到水面呼吸空气的潜水员
The per comes up for air.
潜水员升到水面呼吸空气。
Scuba, Snorkeling and Water-sports apparel (excellent pricing).
配套的水呼吸器，戴呼吸管潜泳并且水运动衣服(优秀定价)。
automatic compressed air guider
压缩空气自动导布器
surface-supplied compressed-air-ping
水面供给的压缩空气潜水
anti-drawning mask
带氧气呼吸器的轻型潜水面罩
The scuba per submerged and swarm toward a coral reef.
戴着呼吸器的潜水员潜入水底，朝珊瑚礁游了过去。
Technical specification for high pressure reciprocating air ping apparatus
GB/T12930-1991潜水装具用高压活塞式空气压缩机技术条件
Application of self-cleaning air filter in centrifugal air compressor
自洁式空气过滤器在离心式压缩机上的应用
respiratory mask for use with oxygen or compressed air bottles
呼吸面具,与氧气或压缩空气瓶一道使用
a new breather in the per's equipment
潜水装备的新式呼吸孔