（） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.
In the cylinder head of a two-stroke/cycle diesel engine, valves are used for（）
The intake valves in a diesel engine are reseated by （）.
The（）has a built-in world map; most areas are displayed on a scale of 4000 nm from the top to the bottom of the screen，and can be zoomed in to 150 nm.
Compensated flow control or constant flow valves are used in hydraulic systems to（）
The exhaust valve opens before bottom dead center in a four stroke engine to（） Ⅰ.allow for blow down Ⅱ.Reduce pumping losses
The injection may be delayed, （）the pumps are in good order, if the fuel lines to the injection valves have not been cleared of air.
The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.
Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The donkey boiler may be given a bottom blow （）
When stand-by engine instructions have been received, it’s necessary to make it sure that all valves in the various systems are（）
In a diesel engine, exhaust valves open before the intake ports are uncovered to （） Ⅰ.reduce pumping losses Ⅱ.reduce back pressure
Differential needle valves used in fuel injectors are directly closed by（）
Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）
The system of valves and cargo lines in the bottom piping network of a tank vessel that connects one section of cargo tanks to another section is called a（）.
The consistent winds blowing from the horse latitudes to the doldrums are called the（）.
（） blow more or less constantly（except when monsoons prevail）throughout all seasons at a mean speed of around 14 knots and are generally strongest in the late winter.
The policeman gave the thief a blow in（）stomach.
By day，you sight a vessel displaying three shapes in a vertical line. The top and bottom shapes are balls，and the middle shape is a diamond. It could be a（）.
The system of valves and cargo lines in the bottom piping network of a tanker that connects one section of cargo tanks to another section is called a（）.
In a diesel engine, blow-by（）
The exhaust valve opens before bottom dead center in a four stroke engine to______Iallow for blow down IIReduce pumping losses
American high school students sink almost to the bottom in a survey of math and science literacy because too many of the high school ______ in America are not qualified.
