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export HS code 90318090 smoke tester IoT fire monitoring production center fire protection system fire safety IP68 pressure sensor fire protection equipme OEM friendly Chinese smoke tester factory smoke test equipment warranty Oceania distributor stove alarm factory stov heat detector tester export license smoke tester shipping documentation ionization smoke detector test sensitivity smoke sensitivity threshold heat tester sample available ODM heat tester CE directive fire alarm deployment case fire pr spare parts smoke tester smoke test tool quality control detector maintenance for office building smoke test for high-rise building senior home safety