s&p silent dual

Electric motors and engines other than for land vehicles; injectors; centrifugal machines; extractor machines; extractors being suction fans; control mechanisms for machines, engines or motors; pneumatic process controllers; fans for motors and engines; air condensers. Temperature indicators; temperature sensors; temperature control apparatus; transformers; switches [electric]; measuring apparatus; electric instruments for analysis; hygrometers; voltage regulators; timer apparatus; control and regulating apparatus; signaling apparatus and instruments; apparatus and instruments for conducting electricity; electric distribution panels; electric apparatus for commutation; apparatus and instruments for accumulating electricity; apparatus and instruments for controlling electricity; measurement and control devices for air-conditioning technology; devices for testing and quality control. Heat regenerators; air-conditioning apparatus; air dryers; air purifiers; extractor hoods; ventilation extractors; extractors [ventilation or air- conditioning]; fans [air-conditioning]; fans for commercial use; fans for industrial use; fans for household use; ventilation installations; air -purifying separators; air filters for industrial use; heating apparatus; humidifiers.