... special projects 专门设计；专用工程 special propellant(s) 特殊推进剂 special-purpose 专用(的)，特殊用途(的) ...
双语例句
1
Arcjet which used water as propellant has special advantage in deep space exploration and manned spacecraft.
以水作为推进剂的电弧加热发动机，在深空探测和载人航天中具有独特的优势。
2
Every oxidizer and the binder in the sponge around it make up a special binary propellant.
每颗氧化剂与其周围海绵层中粘合剂组成了特殊双元推进剂。
3
The liner is a polymeric elastomer coating between propellant and insulation layer or case. The liner-forming is a special step in production of solid rocket motor.