22219ca/w33 spherical roller bearing can withstand much temperature
Methane, chemical name; methane (CH4), as the name suggests, is the gas in the marsh. Bubbles are often seen in marshes, sewage ditches, or septic tanks.
If we strike a match, we can ignite it. That's the natural gas in nature.
Methane is a combustible gas produced by various organic substances, isolated from the air (reducing conditions), and produced by the fermentation of microorganisms at suitable temperatures and pH values. Biogas belongs to the two energy, and is renewable energy.
