Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking being supervision, life-saving and teaching apparatus and instruments, namely, extensometer, telejointmeter, radar, laser, motion sensor, video and alarm devices all for monitoring, alerting, recording and reporting information on natural and environmental hazards; electrical apparatus and instruments, namely, extensometer, telejointmeter, radar, laser, motion sensor, video and al...