dragonfly sitting on a plastic rope having sunbath on the backgorund of blue sky and white clouds.
Chimneys of a nuclear power plant with a pylon for renewable energy on blue sky background
for several cranes on a building construction site for building or public works
for several cranes on a building construction site for building or public works
Traditional Greek white church arch with cross and bells in village Oia of Cyclades Island Santorini Greece
An unidentified male worker on bamboo ladder is repairing telephone line near the community.
Chinese father helps his son with knowledge and experience for his complex and complicated homework assignments for the next day at school
Chinese supervisor or controller and worker or architect look on building site on a clipboard
National musium building of Korea Republic with korean traditional style roof on blue sky background.