Obtaining energy from waste products by the pyrolysic...
Oil extracting apparatus
Oil recovery, etc.
Oil shale retorting process utilizing indirect heat transfer
Oil shale treatment method for the seperation of its...
One-spot cylindrical coke quenching car
Operation of by-product coke oven batteries in the banked...
Organic products and liquid fuels from lignocellulosic...
Oven door seal
Oven for thermal processing of lump solid fuel