山东送变电工程公司技术人员和工人在隧道内研究布线方案（12月4日）。为倡导环境友好型电网建设，由国家电网山东送变电工程公司承建的220千伏烟台龙口至百电变电站地下高压隧道电缆铺设完成。这条隧道电缆全长410米，深5米，可以为龙口市屺姆岛、龙口港、附近5个区上百家企用电提供可靠的电力供应。 新华社记者 范长国 摄     Shandong conversion engineering company technical personnel and workers in the tunnel in the wiring scheme(On December 4,).Advocate for the environment friendly power grid construction,By state grid company of shandong conversion engineering construction of 220 kv yantai longkou to the electric substation underground pressure tunnel cable laying completed.This tunnel cable length of 410 meters,5 meters deep,For here, qimu island longkou city/Longkou port/Five area near the power of enterprises to provide reliable power supply. The xinhua news agency FanChangGuo perturbation

    山东送变电工程公司工人在隧道内布线（12月4日）。 新华社记者 范长国 摄       Shandong conversion engineering company workers inside tunnels wiring(On December 4,). The xinhua news agency FanChangGuo perturbation