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- Why protective earth connection and zero connection can't be mixed up? 保护接地和保护接零为什么不能混用?
- In order to safety,make suer that the earth connection of socket is secure before power on. 2 接通机器电源前，应确保电源插座接地良好，以防机器壳体带点而造成人身伤害。
- The appliance is in class I therefore it must have the wire earth connected. 我是在课堂上的器具,因此它必须有丝地球之间的联系。
- This paper covers such important problems as earth connection,ups,super shielded transformer,earth free of power system and computer room, and methods to deal with them are also put forward. 介绍DCS和PLC供电系统设计和实践中关于接地、不间断电源、超隔离变压器、电源浮空和机房等几个主要问题及处理方法。
- The red sun lights up the sky and the earth. 红太阳照亮了天空和大地。
- Climate and Weather of the Sun Earth System CF 日地系统的天气和气候
- Compact, Robust, General purpose three phase four line filter with earth connections. 紧凑,功能完善,通用三相四线滤波器,带接地。
- The earth, sun and moon are spheres. 地球、太阳和月亮都是天体。
- Safety earth connections must remain connected until the power system is ready to be energized. 安全接地必须在电力系统通电之前保持连接状态。
- The fierce sun parched the bare earth. 灼热的阳光炙烤着光秃秃的大地。
- Check that the bolt connections at the connectionblock and the earth connections are tight, and that the isolating contact system functions correctly. 检查回路连接和接地连接的螺钉是否紧固。
- Like the earth, Mars goes round the Sun. 如同地球一样，火星绕太阳转。
- How far is the Earth from the sun? 地球离太阳多远?
- The sun lights up the sky and the earth. 太阳照亮了天空和大地。
- The sun is distant from the earth. 太阳距地球很遥远。
- It takes the earth one year to encircle the sun. 地球绕太阳运行一周需要一年。
- The seedling have shrivel up a bit in the hot sun. 在炎热的太阳光下，幼苗已有一点乾枯。
- The earth revolves round the sun. 地球环绕太阳运行。
- The Earth's path round the sun is elliptical. 地球绕太阳的轨道是椭圆形的。
- The eggs began to decompose after a day in the sun. 鸡蛋在太阳下放了一天后开始变坏。
