Apparatus and method for removing oil from oil-coated particles
Conversion of coal into hydrocarbons
Oil separating apparatus for oil containing substance and...
Preparation of medicinal white oils and medicinal paraffins
Pretreatment by alkaline wetting and holding at temperature of n
Process for de-ashing coal tar
Separation of fine solids from petroleum oils and the like
Syncrude dedusting extraction
Tilt lock means for a drafting table