皮长公里

皮长公里皮长公里
  1. 新增长途光缆27000皮长/公里,数字微波干线14400公里,电话交换机容量1961万门。

    The total lance of long distance optical cable increases by 27000 sheet km , that of digital microwave links by 14400 km and the number of telephone lines by 19.61 million .