underwater submarine meaning in English

下潜潜艇

High precision positioning for underwater submarine is a long lasting difficult problem in the field of underwater navigation and positioning
潜艇水下高精度定位，长期以来一直是水下导航定位领域的一个难题。
In order to solve this problem about high precision positioning for underwater submarine , this paper proposes a relatively practical scheme
为了解决潜艇在水下长时间航行过程中的高精度定位问题，本论文提出了一种比较实用的解决方案。
Owing to great improvement in anti - submarine technology , especially widely application of airborne anti - submarine equipment , the survivability of underwater submarine faced great threat
随着现代反潜技术的快速发展，特别是航空反潜装备的大量使用，水下潜艇的生存面临越来越大的挑战。
In this paper , a theoretical investigation of the drag reduction for underwater submarine by riblet biomimetic non - smooth surface and microbubble carried out , the prime mechanism of two drag reduction technology is open out , and provide theoretical foundation for engineering , which proved efficiency of thruster
粘性摩擦阻力在低速前进时对航行器的阻力起主导作用,而在高速航行时压差阻力是主要的,因此在设计当中综合考虑了两方面因素,使表面结构具有双重减阻特性。