A large valve,usually installed above the ram preventers,that forms a seal in the annular space between the pipe and wellbore or,if no pipe is present,on the wellbore itself is called the().
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相似题目
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In setting the valves on a steam-smothering system on a tank vessel,the master control valve to cargo tanks should be().
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A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressureThe bold and italic word “which” means ().
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In large marine diesel engines cylinder oils usually contain additives formulated to impart the () to clean the rings and grooves.
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In setting the valves on a steam-smothering system on a tanker,the master control valve to cargo tanks should be().
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A ruptured diaphragm in a thermostatic expansion valve will cause the valve to ().
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A relief valve for a cargo pump is generally installed().
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Even in the absence of express instructions,the authority of the master of a ship is very large and()to all acts that are usual and necessary for the employment of the ship.
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The needle valve in a fuel valve will () when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
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Increasing the valve clearance between a valve stem and rocker arm, will result in the valve ()
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Each cylinder has one starting valve which is usually opened by air pressure and closed by ()
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The satisfactory operation of diesel engine exhaust valves usually depends on()
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A thermostatic expansion valve is properly controlling evaporator superheatAdjusting this valve to lower the superheat will result in a/an ().
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The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by ().
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We usually keep a large supply ()stock.
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On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an ()
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Exhaust valve openings in a diesel engine cylinder head are made as large as practical to ()
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A cracked diaphragm in a thermostatic expansion valve will cause the valve to ().
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The() is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.
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The trees that they are usually very large sometime they have the colored hadags rapped around them or hanging from the branches, these trees are called Shangxin Mod.
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Shangxin Mod is a kind of very old and large tree, usually ( )
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中英互译:Many city residents complain that it is so few buses in their city that they have to spend much more time waiting for a bus, which is usually crowded with a large number of passengers.
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Many science reports discuss medical studies that test the effect of a new drug. Usually, a large number of people is divided into two groups. Each group takes a different substance. But no one knows which group is getting which substance. One group takes the medicine being tested. Another group takes what we call an inactive substance. Medical researchers call this substance a "placebo." The word "placebo" is Latin for "I shall please." Placebo pills(宽心丸)usually are made of sugar.
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Personality is to a large extent inherent——A-type parents usually bring about A-type off-spring. But the environment must also have a (1)_____ effect, since if competition is important to the parents, it is likely to become a (2)_____ factor in the lives of their children.
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Breakfast is the first 11 of the day. We have juice, toast with butter, eggs, and milk. We can also have cereal. We eat lunch 12 Some people like to eat hamburgers and French fries. Others like tuna fish or egg salad sandwiches. Many 13 give children peanut butter and jelly sandwiches for lunch. In the United States dinner is usually the biggest meal of the day. We usually eat dinner at 6:00 in the evening. A large dinner may be 14 soup, salad, meat or fish, vegetables, potatoes and dessert, and coffee, tea, or milk. It is important to eat three good meals a day. That way we can be 15 . 请在_____11______处填上答案