5G Gigabit industrial wireless routers be used in tunnels

Tunnels and underground environments using 5G Gigabit industrial wireless routers are similar in that there is interference with the signal from the earth or rocks. Usually the tunnel is on the ground and the signal is better compared to the underground. If the tunnel is too long and hinders the penetration of the signal, then consider using a routing relay to do an extension for networking. The same can be done normally using 5G Gigabit industrial wireless router networking transmission.