... 1M) 2, varios functions, 3, automatically checking and alerting system 4, power:---220V, 50HZ, 110V/60HZ Scope White ... system, multiband alternative, precise and adjustable. 3. Import sapphire optical crystal, automatic temperature control function to ensure the safety and ... materials, antistatic, anti-interference, pressure and water temperature self-test and alarm system to prevent errors. 7. One key ...