Like the millipedes, centipedes are highly segmented (15 to 177 segments), but with only one pair of walking legs per segment (millipedes have two legs per segment). The head of a centipede has a pair of antennae, jaw-like mandibles (called forcipules) and other mouthparts.
Although compressed natural gas (CNG) is a fossil fuel like diesel, gas and coal, it is far different in terms of its impact on the natural environment.
However, some LPG fuelled products require it to be in its liquid form, such as with autogas LPG liquid injection systems. LPG (Propane) Vaporisation - How LPG Boils. To boil, the liquid LPG draws heat from the steel walls of the gas bottle which, in turn, get heat from the ambient air. LPG liquid boils and turns back into gas vapour when you release some of the pressure in the gas bottle by turning on your gas appliance.