低速前进 meaning in Chinese

easy ahead

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。