helical propelling sleeve

例句：

1. 1. The helical propulsion sleeve is designed to improve the efficiency of the vehicle's propulsion system.
   螺旋推进套筒的设计旨在提高车辆推进系统的工作效率。
2. 2. The helical propulsion sleeve was developed by a team of engineers to solve the problem of low fuelefficiency in diesel engines.
   螺旋推进套筒是由工程师团队开发的，旨在解决柴油发动机低燃油效率的问题。
3. 3. The helical propulsion sleeve has been widely used in marine applications due to its durability and reliability.
   由于其耐用性和可靠性，螺旋推进套筒在海洋应用中得到了广泛应用。