H.sub.2 S indicator
Handle for plumbing fitting
Hanger design for a swinging centrifuge rotor
Hard surfacing for a centrifuge conveyor
Heat exchange and flow control system for series flow reactors
Heat exchanger for nuclear reactor installations
Heat insulating device for an engine exhaust system
Heat shield for a catalytic emission control device
Heat transfer element and tuyere for fluidized bed reactor
Heating device having dumbbell-shaped reaction tubes therein
Helium reclamation
Hemoglobin-oxygen equilibrium curve analyzer
Hermetic sealing of gallium arsenide components
HF Alkylation reaction temperature control system
High density lipoprotein cholesterol assay
High field surface ionization process and apparatus for purifyin
High intensity, non-reversing humidity indicator
High solids aqueous silica dispersion
High temperature chemical reactor
High temperature chemical reactor