H.sub.2 O.sub.2 as a conditioning agent for electrostatic precip
Hamper air purification system
Handling fluid discharged from a conduit at a high velocity
Heat and moisture exchanger
Heat input for thermal regenerative desiccant systems
Heat recovery method and apparatus
Heat-and-moisture exchanger
Heat-reactivatable adsorbent gas fractionator and process
Heat-reactivatable adsorbent gas fractionator and process
Heater block for low cost gas chromatograph
Heaterless adsorption system for combined purification and fract
Heaterless dryer having variable cycle
Heating system with gas jet driven circulation flow for high pre
Heatless adsorbent fractionators with microprocessor cycle contr
Helium leak detection method and system
Heterogeneous membrane and process for production thereof
High aspect ratio solid particulate filtering apparatus and meth
High capacity low resistance vacuum cleaner
High conversion electrostatic precipitator
High efficiency industrial vacuum cleaner and filter element