二要推进部分产能过剩行业调整。
Second, we need to restructure some industries that have surplus production capacity.
先修课程要求：流体力学，船舶原理(阻力、推进部分)。
As a prerequisite the students are assumed to have knowledge in basic fluid mechanics, ship resistance and propulsion.
为了获得更好的混合效果，在虾饲料造粒机的原料加料部分使用了不连续的推进叶片。
For better mixing result, the uncontinuous propelling blades are used in ingredient feeding section of the prawn feed pelleter.
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