Professional technician or engineer worker point to the area of the problem to fix for train
Technician or engineer worker point to the area of the problem to fix for electric train and discuss
Professional technician hold light stick and discuss to his co-worker to the problem of part train
Technician man check part of machine with factory worker woman who touch the machine
Professional engineer or technician worker woman check and discuss the problem of parts under train
Professional engineer or technician worker woman check and discuss the problem of parts under trai
Pretty engineer or factory worker woman hold tablet and explain to technician for the process
Many Cars parked in row on street in city in sunny summer day. ecological problem - air pollution
Toxic, chemical and person in hazmat outdoor for hazardous material disposal, toxic spill and area
Technician repairs air conditioning unit on wall of suburban home during late afternoon
