Research on mental health and related factors in pers;
潜水员心理健康与相关因素的研究
Factor analysis of psychological quality of pers;
潜水员心理素质的结构效度分析
A research of biochemical markers of bone metabolism of per;
海军潜水员骨代谢生化指标的调查分析
a per issuing from the water;
从水面露出的潜水员；
The per came up for air again.
潜水员又露出水面换气。
The per made another discovery.
潜水员还有一个发现。
per's connection
潜水员的救难通知管
DEIC(Diver Equipment Information Center)
潜水员设备情报中心
Internation Association of Professional Divers
国际职业潜水员协会
The pers tried to float the sunken ship.
潜水员想使沉船浮起。
Divers, who pe deep down in the sea, know that the sea can be very cold .
潜入深海的潜水员知道海洋是很冷的。
The per was said to have ped as deep as 200 meters
据说潜水员已下潜到二百米的深度。
steel helmet (excl. pers' helmets for fitting to ping suits)
钢盔（不包括同潜水衣配套的潜水员头盔）
The per went into the deep water beyond the danger limit.
潜水员下潜到超过危险线的深水中去了。
Two pers work together while a standby per remains on the surface.
两名潜水员协同工作,同时有一名候补潜水员留在水面上。
A per who comes up for air
一个升到水面呼吸空气的潜水员
Technical regulations for per's safe use of electricity under water
GB16636-1996潜水员水下用电安全技术规范
Divers had to rely on air pumped from the surface.
潜水员所需的空气是从水面输送的。
The per stayed down for some time.
潜水员在水面下呆了一段时间。
The per comes up for air.
潜水员升到水面呼吸空气。
line that raises or lowers a deep-sea per.
一种沉下或拉上深水潜水员的救生索。