biogas equipment 1.Biogas fermentation tank 2.Has self-locking bolts,easy to install, dismantle 3.Anticorrosion, good quality ... tank is assembled by special steel plates, dedicated sealing materials, self-locking bolts, etc. There are paint film protective layer on ... :1,High corrosion resistance, long use time.2,High strength self-locking bolts which have glue cap, good effect of water ...