Which of the following devices is common to both mechanical and hydraulic governors?（）

It is mechanical operated by a cable system, rather than a hydraulic one．

What does the autopilot system include?? Hydraulic system|Mechanical system|Electrical system|All of above

It consists of mechanical system, hydraulic system, electrical system and electronic control system, all working together in perfect harmony．

Which of the following is not included in the ore transportation method?( ) A: Gravity transportation B: Mechanical transportation C: Drilling transportation D: Hydraulic transportation

词汇与结构 The complexity and weight of mechanical flight control systems increase considerably with the size and performance of the aircraft. Hydraulic power _________ these limitations.

A large change in ambient temperature， or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor， will result in the need to adjust the （）.

Which of the following is the ore breaking methods?( ) A: Artificial ore breaking B: Mechanical and hydraulic ore breaking C: Rock drilling and blasting D: The other three options all meet the requirements

（） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.

The Wartsila RT-flex and MAN Diesel& Turbo()ME engine designs offer similar approaches to the electronic control of starting air and also to the electronic control and ____operation of the exhaust valve. A: mechanical B: Pneumatic C: hydraulic D: automatic