?差动活塞

... stepped grate 阶梯炉篦 stepped piston 差动活塞 stepped shaft 阶梯式轴 ...

?阶梯形活塞

... stepped gear 塔齿轮 stepped piston 阶梯形活塞 stepped thread adaptor 异径螺纹接头 ...

[机]?塔形活塞

... 阶段{用于两栖作战} phase {amphibious operations} 阶段活塞；塔形活塞 stepped piston 阶级 rank ...

?级形活塞

... stepped motor 步进电机 stepped piston 级形活塞 stepped pulley 级轮 ...