【机械工程】非正置换器或发动机【机械工程】非正位移机器或引擎

non-positive displacement machines or engines

working fluid non-positive displacement machine or engine

preventing in non-positive displacement machines or engines, form of blades

preventing in non-positive displacement machines or engines, device

shutting-down non-positive displacement machine or engine

combination of two or more non-positive displacement machines or engines

steam turbine casing, non-positive displacement machine or engine

non-positive displacement machine or engine；