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Young African-American QA engineer working with laptop and mobile phone in office at night

A technician operates a fiber optic tester, showcasing intricate measurement techniques for network diagnostics and performance evaluation in a professional setting.

Electrician Testing Electrical Panel with Digital Insulation Resistance Tester Showing 500M Ohms Reading - Safety Inspection, Periodic Maintenance and Facility Management Concept

Pool water test kit with ph and chlorine color chart beside white tablets on pool edge. Blue water in background

A technician analyzes a fiber optic tester during installation, showcasing cables and tools used in network communication for effective signal verification.

A woman uses perfume testers and sprays the fragrance from the bottle.

Digital multimeter with wires, tool for battery voltage checking

The scene captures a surface roughness measuring machine (profilometer) as its tactile stylus traverses the metal surface to quantify microscopic irregularities

The coronavirus check post on the highway. Translation: The road service

Blood test with face mask and cannula and blood tubes for the corona epidemic and inscription COVID-19

Businessman data analysis for performance and quality assurance, testing methods, process validation, defect detection, compliance checks, standard monitoring, and continuous improvement

Salisbury, Wiltshire, England, UK. August 2020. portarit of a woman Covid-19 tester wearing protective clothing, visor, mask and goggles at a test station in the UK

Red Circuit Tester isolated on white background

Professional car mechanic using a digital battery tester to inspect vehicle performance during routine maintenance. Automotive technician performing diagnostics under the hood in a repair shop.

Swimming pool water tester set on wooden table with space on clear pool water background, quality water tester, pool service and maintenance industry

Blonde woman enjoying the scent of a perfume tester in a beauty shop, carefully selecting a fragrance for herself from a diverse array of products on the shelves

transparent glass perfume samples testers bottles with black caps on white background top view, space for text. mockup.

Auto mechanic using AC Manifold gauges tester checking and examining air condition pressure and leak for car in repair service

Electric engineer calibrete earth clamp tester with calibration sheet before testing.

Close-up of a hand holding a car battery tester with orange buttons. The background shows a blurred car battery in a garage setting.

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