A relay is used in electrical engineering to register overcurrent, overvoltage, reverse power flow, and over- and under-frequencies to avoid accidents or flashovers. It trips the circuit breaker when a fault is detected. If there is any discrepancy or abnormality in the current voltage or any other power measurement, the relay detects it and triggers an alarm. There are two types of relay: electromechanical relays and digital relays. Solid-state relays are electronic switching devices that operate on application of small external voltage across control terminals. Solidstate relays are smaller than electromechanical relays and are more reliable as they do not have moving parts.

关键词：继电器；电气工程；跳闸断路器；检测故障

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Waterjet machines provide an efficient method for developing intricate machine parts with relative ease and precision. These machines facilitate versatile and effective machining, cutting, and shaping of metals and other materials. A waterjet machine uses a pump to eject water at an extremely high pressure (approximately 6,000 bars) through a nozzle and flushes out a cutting jet of water to cut metals. There are two types of waterjet machines: pure waterjet machines and abrasive waterjet machines. Waterjet machines are used across several industries such as Automotive, Die Mold, Part Manufacturing, Aerospace, Defense, Shipbuilding, Electric and Electronic, Healthcare, Consumer Durables, Plastics, Woodwork, Food Processing, Glass Work, and Robotics, and also in several Job Shop sectors. These machines generate less heat compared to other cutting technologies, and can, therefore, be used on materials that are very sensitive to high temperatures. Waterjet machines also help ensure minimal wastage of the metal.

关键词：高压水机；机器零件；容易；精确度；水射流切割金属

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Skid-steer loaders are compact in size, have a small rigid frame, and have an engine-powered machine with lift arms. They are used to perform a variety of tasks in the Construction industry. They can be easily fitted with attachments and labor-saving tools to perform several tasks on the construction site. This equipment is highly maneuverable because of its compact size, and the ability to support attachments makes it even more versatile.

关键词：滑移装载机；刚性框架；发动机驱动；机提升臂

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Drilling involves the boring of a hole in the earth's surface for extraction of oil and gas. The holes drilled for the extraction of oil are known as oil wells. These wells are created by drilling a hole of 12 cm to 1 m in diameter with a drill rig, which rotates the drill string with other downhole drilling tools attached to it. Drilling downhole tools facilitate the drilling process and counter challenges associated with drilling such as extreme depth, high temperature, and pressure difference. These tools guide or steer wells through a small reservoir by changing the trajectory of the well. Currently, a variety of downhole drilling tools are available in the market that can be used in BHA. Some drilling tools are unique and specific to a particular drilling operation while others are generic in nature and can be used for multiple purposes.

关键词：钻井；表面提取；石油；天然气；油井；钻井井下工具

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A smart grid networking platform consists of three components, namely, hardware, software, and services. Hardware includes cables, switches, in-home devices, and controllers. These devices are backed up by networking software, which consists of network performance monitoring management, IP address management, network traffic management, network device management, network configuration management, network security management, and other related software. These hardware and software components coordinate to develop a mesh network that provides a utility grid with features such as substation automation, distribution automation, energy management, real-time control, self-healing, and increased reliability and security. Smart grid networking systems enable a utility to analyze and map the energy consumption patterns of its customers, thereby helping in load forecasting and peak demand management along with risk determination. The systems also enable the reduction of power outages by providing detailed information about the functioning status of the power system network. With the rapid development of smart grids and smart grid-related equipment and solutions, management of huge data volumes has become a major concern among power utilities.

关键词：智能电网；网络平台；设备备份；网络软件；网络性能；监控管理

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Well cementing is the process of giving structural support to the wellbore by introducing cement in the annulus between the casing and the wellbore or between two successive casings. The primary purposes of wellbore cementing are:

关键词：固井；引入水泥井筒；结构支撑；壳体和井筒

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Gesture recognition involves the mathematical calculation of human interactions using a computing device. The gestures captured by a camera are passed through a number of mathematical algorithms before the computing device interprets them and performs an action. The output of the mathematical algorithm is the functions performed on the devices.

关键词：手势识别；人类相互作用；数学计算；计算设备；照相机所捕获

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Scars are permanent patches of fibrous tissue that result from the healing process of a wound and can be treated using invasive and non-invasive techniques, including surgery and OTC treatment products. These products and procedures can be used to treat all types of scars, such as keloid scars, contracture scars, hypertrophic scars, and atrophic scars. Scars caused by surgery can be removed by surgical revisions, although most people are reluctant to go for another invasive procedure after a surgery. Apart from the easily available OTC scar treatment products, patients can also go for lesser known alternatives such as cryotherapy, clinical peel, and compression.

关键词：疤痕；纤维组织；永久补丁；侵入性；非侵入性技术；外科手术；OTC

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Contact centers are the central point in an enterprise for the management of all customer contacts. They play a prominent role in an enterprise's customer management strategy. Currently, contact centers are adopting new technology to perform multichannel operations. This enables customer expectations to be met with an advanced level of interaction.Companies are outsourcing their contact center functions to third-party service providers. This helps client firms increase operational efficiency, enhance customer experience, concentrate on their core competencies, reduce time-to-market, obtain access to fresh talent and experience, use the latest technologies, and build an organization with an economical cost structure in the long run.

关键词：联络中心；所有顾客；管理联系人；客户管理策略

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Sports medicine refers to a division of medicine that concentrates on physical fitness, treatment, and prevention of sports and exercise-related injuries. It also helps in assessing and understanding the performance of athletes. It includes sports injury prevention and treatment, exercise for health, recommendations for training, and nutrition and medicine in sports.

关键词：运动医学；体能；治疗；预防运动；运动相关；伤害；评估和理解；运动员；表现

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