Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mills.
水是机械动力的主要来源，而到了17世纪末，人们认为仅英格兰就有2万个左右的工作磨坊。
Electricity is then converted from the main power source of the CubeSat, typically batteries or a solar panel, and applied to a tiny structure roughly the size of a postage stamp.
然后来自立方体卫星上的主要能量源，通常是电池或者太阳能板转化来的电能，应用到一个邮票大小的结构中。
The nuclear plant lost its main source of electric power to drive the pumps, and the tsunami knocked out the backup diesel generators that were supposed to drive the pumps in an emergency.
核电站失去了驱动冷却水泵的主要电力来源，海啸损毁了本应在紧急情况下驱动水泵的备用柴油发电机。
Australians ever since have enjoyed cheap power from this dirty source of carbon-dioxide, the main culprit of global warming.
自此澳大利亚人就利用这种产生大量二氧化碳的燃料获取廉价能源，而二氧化碳恰恰是全球变暖的罪魁祸首。
The main anthropogenic source of SO2 is the burning of sulfur-containing fossil fuels for domestic heating, power generation and motor vehicles.
人为的二氧化硫主要来源是为家庭取暖、发电和机动车而燃烧含有硫磺的矿物燃料。
The shear stress is the main power source for mineralization, and activation, overlapping and enrichment of ore-forming fluid occur in each shear deformation phase.
剪切应力，是成矿的主要动力来源，各剪切变形阶段，均有矿液的迁移、叠加和富集。
Power source is the source of strength, positive force guiding the school reform is the main source of strength to enhance the quality of the school.
力源是力量的源泉，引导学校变革的正向力量是提升学校品质的主要力量来源。
By testing the hydraulic system of 200mn press, it is shown that the coupling vibration of power fluid and pipeline is the main vibration source of the system.
通过测试200MN油压机液压系统表明动力流体和管路的耦合振动是液压系统主要的振动源。
A mass of power electronics equipments with nonlinear characteristic are the main source of harmonics in low-voltage power system.
低压电力系统中大量具有非线性特性的电力电子设备是产生谐波的主要原因。
This paper collects and analyzes the harmonic signals of the CO2 welding machines main transformer, by which researches the effect of welding power source on the main.
对晶闸管CO2焊接电源焊接过程主变压器一次侧产生的谐波信号进行采集分析，以此研究焊接电源对电网的影响。
Through noise data collection and power spectrum analysis of turbojet and turbofan, the main noise source and characteristics of noise are discussed.
通过对涡轮喷气及涡轮风扇发动机试车噪声的采集和声功率谱分析，讨论发动机的主要噪声源和噪声的特征。
The problem of annual arc welding power source whose output is surge and power factor is lower, is solved by means of main circuit, arc ignition circuit and arc static circuit working together.
通过主回路、引弧电路、稳弧电路的共同作用，解决了一般弧焊电源输出脉动大、功率因数低的缺点。
A method, with a guaranteed rate of 97%, to calculate mine water available was proposed and used in the water resources demonstration of main source of Jinshan coal gangue power plant in Fuxin City.
利用很少的资料，提出一种求解97%保证率矿井水可利用水量的计算方法，并利用此种方法对阜新金山煤矸石热电厂的主水源进行了水资源论证。
The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).
该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。
Using RT-LAB, a real-time simulation is made for the high-power inverter source, capture technology of SPWM wave is introduced, IGBT model is built, and the main circuit is set up.
本文利用RT - LAB对大功率逆变电源进行实时仿真，介绍了SPWM波的捕获技术，搭建IGBT模型，完成主回路的建模。
This system consists of interactive-drawing programming system, control of working, power source with large power pulse, the main unit uses pentium 586 chip.
本控制系统由交互式绘图编程、加工控制、大功率脉冲电源三部分组成，主机采用奔腾586计算机。
Thermal Power Station is the second net heat source, the main energy-consuming device is a heat exchanger, circulating pump and fill the secondary network of pumps.
热力站是二级网热源，主要耗能设备是换热器、二级网循环水泵和补水泵。
The wind generator is the main power source of the system, and the battery is used for energy storage and power compensation to recover the natural irregularity of the wind power.
风力发电机的是该系统的主电源，并且电池用于能量存储和功率补偿来恢复自然的风电不均。
The main function of variable frequency power source is to change the current AC power to the needed stable pure power.
变频电源的主要功用是将现有交流电网电源变换成所需频率的稳定的纯净的正选拨电源。
The structure and component of the IGBT inverter type welding power source are introduced in the paper. The welding power source include main circuit, control circuit and protect circuit.
论文介绍了IGBT逆变焊接电源系统的结构和组成，整台焊接电源包括电源主电路、控制电路和保护电路。
This paper is for introducing a main connection scheme and auto-switch manner of its back-up power source, which is with high reliability and suitable for feeding power to important loads.
介绍了一种高可靠性的适合带重要负荷的电气主接线方式以及该主接线的备自投方案。
For the non-function intensity type fiber optic sensors, the main intensity errors are caused by the variation of (1)source device output optical power;
在非功能式强度型光纤传感器中，造成光强变化而导致较大信号误差的主要原因有如下几个方面：（1）光源输出光功率的变化；
The output part of the electronic circuit controls a main electric power source, an acoustic horn loop and a brake system.
电子线路输出部分控制车辆的用电总电源、喇叭回路及刹车系统。
The output part of the electronic circuit controls a main electric power source, an acoustic horn loop and a brake system.
电子线路输出部分控制车辆的用电总电源、喇叭回路及刹车系统。
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