- constant piston
- constant pitch
- 不变: invariant
- 桨距: pitch; propeller pitch; blad ...
- 可变桨距: variable piston
- 变桨距调节机构: regulating mechanism by adjusting the pitch of blade
- 桨距: [航空] pitch; propeller pitch; blade pitch◇桨距角 propeller pitch angle; 桨距控制 blade pitch control; 桨距调节(机构) pitch control; 桨距调整 pitch setting; 桨距自动调整装置 autocoarse pitch
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