constant temperature incubators; air-gas producing apparatus in laboratories

[ Electrolysers; gas alarms; laboratory apparatus and instruments, namely, air-gas producers and constant humidity incubators; laboratory experimental machines and apparatus, namely, air-gas producers and constant humidity incubators; measuring or testing machines and instruments, namely, gasometers, hygrometers, automatic pressure control machines and instruments, and automatic vacuum control machines and instruments; expired gas analyzers used for scientific purposes when euthanizing small ...