The purpose of the low pressure cut-out switch is to （）.
The sensing line for the low pressure cutout switch to a refrigeration system is located （）.
In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）
Compared to the amount of concentrated foam liquid used，the amount of low expansion mechanical foam produced is（）.
The device used for low-pressure control and high-pressure cutout on a compressor is called （）.
Either a low injection pressure or a leakage of piston rings is able to lead （）.
Generally speaking，you should expect to find low atmospheric pressure prevailing in the earth’s（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.
Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）
If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you，what winds can you expect in the Southern Hemisphere?（）.
Low compression pressure in a diesel engine is caused by（）
In order to accurately measure very low pressures, which of the instruments listed should be used?（）
If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position，what winds can you expect in the Northern Hemisphere?（）.
Which general weather conditions should you expect to find in a low pressure system（）.
Low compressor head pressure in a refrigeration system can be caused by（）.
A low pressure annular preventer which is used to direct flow of kick fluids away from the rig floor is called a （）.
According to Buys Ballot’s law，when an observer in the Northern Hemisphere experiences a northwest wind，the center of low pressure is located to the（）.
If an observer in the Northern Hemisphere faces the surface wind，the center of low pressure is to his（）.
Low compression pressure in a diesel engine can be caused by（）
The purpose of the refrigeration system low pressure cutout switch is to （）
One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.
207. The greater the pressure difference between a high and a low pressure center, the ______ .
A generally circular low pressure area is called a (n) ______.
People with low self-esteem are compared to leaves because they _______（）
