Chifukwa Chake Ma Tunnel Amagwiritsa Ntchito Magetsi Otsimikizira Kuphulika

Kuphulika kwa mpweya woyaka moto, monga methane, zimachitika kawirikawiri mu tunnel. Malamulo oyendetsera chitetezo cha zomangamanga amafuna kugwiritsa ntchito zida zowunikira zomwe sizingaphulike.