underwater propulsion unit的意思|示意

Underwater elastomeric energy storage propulsion unit (UEESPU) is a kind of new propulsion unit, which dramatically features as follows: simple structure, low cost, in particular, low noise.

水下弹性储能推进装置是一种新颖的推进装置，具有结构简单、成本低、噪声很小等显著优点，非常适合装备我国的船舶。

Once you are on the surface, the main unit for propulsion are your arms, so it is very important that your draw the right pattern underwater, and that is a hourglass pattern.

身体浮到水面后，最大的推进力量就来自手臂。因此正确的水下划水路线非常重要，也就是沙漏状划水。