74d85691_biogas__Janata
[#] 6. [KVIC] The floating mild steel gas holder need regular maintenance to prevent corrosion. It has short life. [Deenbandhu] There is no moving part and hence no recurring expenditure, It also has a long working life. [Janata] 
There is no moving pert and hence no recurring expenditure. It also has e long working life.
biogas
Janata