... 阶段{用于两栖作战} phase {amphibious operations} 阶段活塞;塔形活塞 stepped piston 阶级 rank ...
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stepped piston compound compressor 差动活塞式压缩机
stepped piston ring 阶梯式活塞环
stepped piston engine 阶梯式活塞发动机
stepped piston vibrator 阶梯式活塞气锤
internally stepped piston ring 内沉肩扭曲活塞环
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