Unit for drying gypsum plaster board
Unit for regenerating the heat produced by exhaust gases in mova
Unitary protective refractory member
Upright kiln and attendant method for heating an aggregate mater
Use of dewatered digested sewerage sludge as the bloating agent
Use of silicone oil as a polyethylene oxidation retardant in a t
Use of thermal insulation for noise abatement