Gas leak alarms; alarms and warning equipment, namely, burglar alarms, electronic warning bells, warning triangles; warning bells; explosion-proof electric and light switches; burglar alarms; limit electric switches; waterproof electric and light switches; emergency warning lights; sirens; electric switches for ships; signal lights, namely, rotating lights; sound alarms; alarms for the detection of inflammable gases; electrical and electronic burglar alarms; electric alarm bells; electric the...