The word "valvulotome" means _______________.
A: incision of a valve
B: an opening of the valve
C: an instrument for cutting a valve
D: surgical repair of a valve
A: incision of a valve
B: an opening of the valve
C: an instrument for cutting a valve
D: surgical repair of a valve
举一反三
- Which of the following means surgical repair of the valve? A: phlebotomy B: myorrhaphy C: valvuloplasty D: agiography
- Which of the following hydraulic control valves belongs to pressure control valve （ ）. A: Unloading valve B: overflow throttle valve C: Hydraulic control check valve D: Low pressure selector valve
- The commonly used pressure control valve in hydraulic transmission system is ( ) A: directional valve B: relief valve C: hydraulic control check valve
- A throttle valve is a simple flow control valve, a throttle valve is virtually equal to( ).
- In order to ensure that the pressure difference between the front and rear of the throttle valve remains unchanged when the load changes, the flow through the throttle valve is basically unchanged. The throttle valve is often connected with ( ) to form a speed control valve, or the throttle valve and ( ) are connected in parallel to form a bypass speed control valve. A: Pressure reducing valve B: constant pressure reducing valve C: overflow valve D: differential pressure relief valve