Tunnel works - Special level. Length of the 1A factory water tunnel is 4,592.10 and is designed in a horseshoe-shaped cross-section. Length of the 1B factory water tunnel is 2,171.34m and is designed in a horseshoe-shaped cross-section. Construction of water tunnels by drilling and drilling closed tunnels with specialized equipment. Construction of weirs and dams using poured-in-place concrete method
Quang Ngai province
30/4 Quang Ngai Joint stock company