Leak Detection and Repair (LDAR) Market (By Product: Handheld Gas Detectors, UAV-Based Detectors, Vehicle-based Detectors, Manned Aircraft Detectors; By Technology: Volatile Organic Compounds (VOC) Analyser, Optical Gas Imaging (OGI), Laser Absorption Spectroscopy, Ambient/Mobile Leak Monitoring, Acoustic Leak Detection, Audio-Visual-Olfactory Inspection) - Global Industry Analysis, Market Size, Opportunities and Forecast, 2018 - 2026