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为了保证船舶航行安全,首先要确定船舶的航向与位置。船舶定位方法按照参照目标可分为( )。

The diesel engine is a type of ().
A marine diesel engine is started by()
Before a marine diesel engine is started the cylinders and pistons must be ().
Compared to a naturally aspirated diesel engine, a supercharged diesel engine has()
Cold weather starting of a diesel engine is more difficult than warm weather starting due to()
One end of a diesel engine cylinder is sealed by the cylinder head and the other end by the ()
Corrosion inhibitors and/or soluble oils are added to diesel engine cooling systems to ()
One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the ()
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the ().
The marine diesel engine is a type of diesel engine used on ships The () of its operation is not very difficult to understand.
How should you warm up a diesel engine that has not been run for some time? ()
Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?()
A diesel engine is supercharged in order to()
The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and ().
There is () in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.
If a diesel engine starts firing, but is unable to come up normal speed, either without load or even under a small load, the cause may be ()
Excessively worn, or polished ends on a diesel engine valve spring, indicate()
In a diesel engine, fuel must be broken up into a spray of fine droplets to ().
Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?()
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