乐亭县

在乐亭县农村中压电网中，由于输电线路长、配电变压器多、负荷季节性和时变性较强，线路无功损耗更加明显，使得农网存在较大的降损空间。

Leting County in the medium voltage power grid , because of long transmission lines , distribution transformers and more seasonal and time-varying load of strong reactive power loss is more obvious , so there is a big loss reduction and rural power grid space .

乐亭县历史悠久，早在新石器时代晚期就有人在这里繁衍生息。

Laoting County has a long history , as early as the late Neolithic period some people thriving here .

乐亭县自然灾害史之警示及防减灾措施探讨

The Warning of Natural Disaster History in Lao Ting County and the Measures About Preventing and Reducing Disaster

元至元五年（1268年），省马城入滦州及乐亭，县地属永平路滦州。

Five million Yuan ( 1268 ), provincial income Maastricht Luanzhou and Laoting , County Road , an Luanzhou Yongping .