气动马达按结构形式可分为（）气动马达、（）气动马达和（）气动马达等。
参考答案：叶片式；活塞式；齿轮式
Tara:This is Tara Patel from Cotton House in Kidderminster. Could I speak to Mr Smith, please?
Mr Smith:______
A．Hello.
B．I’m Mr Smith.
C．Who are you?
D．Speaking.
YCZ-1A型遥测站控制板上按钮S1起什么作用？
