Fired hollow brick making machine (tunnel kiln)

Fired hollow brick making machine,named tunnel kiln,for firing the brick.The fuel can be coal,natural gas,light diesel oil or heavy diesel oil. Parameter: 4.6m Once Firing Tunnel Kiln Model:144.25*4.6*1.23 Annual Capacity: 30 million pieces 6.9m Once Firing Tunnel Kiln Model:144.25*6.9*1.23 Annual Capacity:45 million pieces 6.9m Twice Firing Tunnel Kiln Model:144.25*6.9*1.62 Annual Capacity:60 million pieces 9.2m Once Firing Tunnel Kiln Model:144.25*9.2*1.23 Annual Capacity:60 million pieces