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... 转速控制的推迟喷油时刻 retarded injection timing with speed 转筒阀 drum valve 转叶式增压器 vane-type supercharger ...
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... 滚子扩管器 roller tube expander 转筒阀 rotary sheeve valve 顶桅支索 royal stay ...
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drum valve
rotary sleeve valve
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drum valve
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