查询词典 mains

Yes. From Roundwood reservoir in county Wicklow of a cubic capacity of 2400 million gallons, percolating through a subterranean aqueduct of filter mains of single and double pipeage constructed at an initial plant cost of 5 pounds per linear yard by way of the Dargle, Rathdown, Glen of the Downs and Callowhill to the 26 acre reservoir at Stillorgan, a distance of 22 statute miles, and thence, through a system of relieving tanks, by a gradient of 250 feet to the city boundary at Eustace bridge, upper Leeson street, though from prolonged summer drouth and daily supply of 12 1/2 million gallons the water had fallen below the sill of the overflow weir for which reason the borough surveyor and waterworks engineer, Mr Spencer Harty, C.

48流了。从威克洛郡的容积二十四亿加仑的朗德伍德水库，流经达格尔河、拉思唐、唐斯峡谷和卡洛希尔，流进坐落于斯蒂尔奥根那二十六英亩的水库，中间的距离是二十二法定英里。这条有着过滤装置的第一期施工的单管及复管地下引水渠，根据合同直线每码的铺设费为五英镑。再由一批水堰进行调节，以二百五十英尺的坡度在上利森街的尤斯塔斯桥流到本市界内。但是由于夏季久旱，再加上每天供水一千二百五十万加仑，水位已降到低于排水口。

The phase of the magnetic field in this startup winding is shifted from the phase of the mains power, allowing the creation of a moving magnetic field which starts the motor.

启动绕组磁场的相位随着电网的相位变化而变化，从而产生一个启动电机的旋转磁场。

Mobile agricultural fire pump Mobile agricultural fire pump According to the weak economic foundation of rural fire prevention facilities at this stage, based on the actual weak, the multi-functional fire-fighting facilities, agricultural economic, practical, starting from the high-pressure pump, agricultural diesel engine, fire mains Reel assembled through a fixed pulley implementation-driven, to ensure the effectiveness of fire fighting work and persistence.

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By the time mains electricity reaches your home, more than 10 per cent of the power that was fed into the grid by the generating station has been wasted as heat, produced by the electrical resistance in the transmission cables.

但是在发电厂产生的电流通过电力网输送到你家之前，由于电缆有电阻，已经有超过10％的电能转化为热能损失掉了。

Dr Barrett proposes that the immersion heater elements be turned on and off remotely using ripple control - a communication system with transmissions sent through the mains electricity supply as high-frequency pulses.

"我们可以通过波纹式控制遥控浸入式加热器（一个传输电源形式为高频率脉冲的通信系统）上的一种小的开关接收这些信号，根据信号提供的能源供应量来控制加热器的运作"Barrett博士说。

Secondly,the initial boundary value problem for the MHD equations in three-dimensional do-mains was considered in chapter three.

其次在第三章中考虑了三维区域上MHD方程的初边值问题。

In this process, the supply frequency of the motor is not changed; it is always identical to the relevant mains frequency.

在此过程中，电机的供应频率是不变的。它总是与相关的主频率相同。

The mains frequency is 50Hz in the Soviet Union and Europe,and 60Hz in the United States.

The频率范围内的水管是在苏联和欧洲的50赫兹，以及在美国States。

My "mains" frequency is 60 Hz.

我的市电频率是60Hz。

What we need is a waveform-less voltage, otherwise we'd hear the twice mains frequency waveform.

但我们需要的是没有波形的电压，否则我们会听到交流电源频率两倍的声波，以及大量失真。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。