Terms for subject Submarines containing 级

Chinese	English
一级潜水员	first class scuba diver
三级增压器	three-stage blower
三级潜水员	third class scuba diver
不均衡单管一级减压部	unbalanced single-hose first stage
二级潜水员	second class scuba diver
单级应需调节器	single-stage demand regulator
均衡式第二级	balanced second stage
高级潜水员	advanced scuba diver