73319522
Jul 16, 1981
Feb 15, 1983
Apparatus for Controlled Removal of Solids and Gases from Drilling Mud-Namely, Mechanical Screen Vibrating Machines, Shale Shakers and Screens Therefor, Centrifugal Pumps and Cyclones, Agitators, Metal Holding Tanks and Parts Thereof Sold in Conjunction with One or More of the Aforementioned Goods
Machinery