To prevent this condition, some pumps have "run dry" sensors that detect a lack of water flow and shut off the pump to protect it.
为了防止这种情况的发生，一些泵装有空转的探头用来保护机器当探测到没有水的情况下烧坏掉。
LDL (bad cholesterol) is the main source of cholesterol buildup and blockage in the arteries, which can prevent proper blood flow to your heart and lead to a heart attack.
LDL(“坏”胆固醇)是动脉中胆固醇形成和堵塞(可阻碍有充分地血流流向你的心脏而导致心脏病发作)的主要来源。
A float collar is placed at the top of the float joint and a float shoe placed at the bottom to prevent reverse flow of cement back into the casing after placement.
浮箍是放置于浮动接头之上的，而浮鞋则是放置于浮动接头之下，以防止水泥浆回流到套管内。
In a situation where it is likely that a ball will be carried out of bounds by the flow of water in a water hazard, it is suggested that a screen be installed to prevent such an occurrence.
在这种球可能将会被水障碍中的水冲到界外的情况下，建议安装一个屏障以阻止这种情况的发生。
Color Doppler Flow Ultrasound is a convenient and effective method to investigate carotid artery plaque, which is important to prevent the onset of cerebral infarction.
彩色多普勒超声是检测颈动脉粥样硬化斑块最简捷的方法，对临床预防脑梗死有重要的意义。
To cohere or fuse with another part as a result of high pressure or temperature and restrict or prevent further motion or flow.
卡住，咬住：因高压或过热而与其它部分连接或融合，从而限制或阻止进一步移动或流动。
Then, begin to prevent a flow, a flow of communication ability, so do not wear clothes too hot or too cold , to fit the environment at that time and weather, it is best to wear masks on the streets.
接着，就要开始预防甲流，甲流传播能力强，所以不要穿太热或太冷的衣服，要适合当时的环境和天气，最好上大街时戴上口罩。
Designed to prevent the flow of contaminated water back into the potable water supply, these devices require no plumbing changes, and screw directly onto a sill cock.
其功能在于防止污染水回流到饮用水供应系统中，这些装置不需要对改变管线，只需要直接螺纹旋在洒水龙头上即可。
This latter function is necessary to prevent one form of vapor lock: a stoppage of fuel flow caused by an insufficient amount of atmospheric pressure inside the tank.
特别要防止汽油收缩时，由于油箱内的大气压力不足导致供油中断。
A new liquid hydrogen loading system is introduced. In order to prevent two-phase flow, an important improvement of the original loading system was made.
简要介绍了新型液氢加注系统，为防止两相流，对原系统做了重大改进。
Arrested traffic flow in which vehicles that are stopped partway through an intersection because of a blockage ahead prevent crossing traffic from moving.
停滞的车流，因前方的堵塞而使车子不能前行，从而导致车辆停滞在交叉路口上。
All Stenner metering pumps have a 3-point roller design in the pump head, which ACTS as a check valve to prevent back flow, siphoning, overdosing and loss of prime.
泵头有3点滚筒设计，设备可作为止回阀阻止回流，虹吸，过量用药和避免大量的材料损失等。
In this paper, a conical swirl-proof device is proposed to prevent eddy and flow separation in the water - inhaling pipe of the pump.
本文提出了一种消除泵站水泵吸水管内旋涡和流动分离的圆锥形防涡装置。
These functions enable a higher-level unit, such as a body control module to monitor the state of the electronic-control unit and prevent secondary problems due to continuing current flow.
上述功能可使车体控制模块等高级单元得以实现，并可监测电子控制单元的状态和防止电流引发的其他问题。
These functions enable a higher-level unit, such as a body control module to monitor the state of the electronic-control unit and prevent secondary problems due to continuing current flow.
上述功能可使车体控制模块等高级单元得以实现，并可监测电子控制单元的状态和防止电流引发的其他问题。
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