2.(2) the velocity model in the western part has a crustal thickness of 61-64km, an upper mantle velocity (P wave) of 7.8-7.84 km/s, a 27-28.5 km thick upper crust with an average velocity of 5.82-5.96 km/s and a 34-35.5 km thick lower crust with an average velocity of 6.94-7.0 km/s.
西部地壳厚61—64km,壳下 P 波速度为7.8—7.84km/s,壳内上层平均速度为5.82—5.98km/s,厚27—28.5km,下层平均速度为6.94—7.0km/s,厚34—35.5km。收藏指正
3.The total length of long-distance optical cable installed increased by 27,000 sheath km, that of digital microwave links by 14,400 km, and the number of telephone lines by 19.61 million.
