alternative
asian
business
cell
conservation
construction
ecology
electric
electrical
electrician
electricity
employee
energy
engineer
engineering
environment
environmental
equipment
farm
generator
green
group
helmet
industry
innovation
installation
labor
maintenance
man
men at work
mobile phone
outdoors
panel
person
photovoltaic
plant
power
renewable
roof
safety
service
solar
structure
sustainable
system
technician
technology
water
working
定額
Two professional technician workers with safety uniform work with solar cell panels system to check and maintenance over water reservoir in concept of green energy environment.の素材 [FY310225249796]
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