第二类驱动阀门：借助手动、电动、液动、气动来操纵动作的阀门。如闸阀，截止阀、节流阀、蝶阀、球阀、旋塞阀等。Class ii drive valve: manual, electric, hydraulic, pneumatic to control the action of the valve. Such as gate valves, globe valves, throttle valves, butterfly valves, ball valves, plug valves and so on.
第二类驱动阀门：借助手动、电动、液动、气动来操纵动作的阀门。如闸阀，截止阀、节流阀、蝶阀、球阀、旋塞阀等。Class ii drive valve: manual, electric, hydraulic, pneumatic to control the action of the valve. Such as gate valves, globe valves, throttle valves, butterfly valves, ball valves, plug valves and so on.
参考答案和解析
C
相关考题：
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