Technological progress in space, pollution controlTechnological progress in space, pollution control
The brown detail of the chain among the black linksThe brown detail of the chain among the black links
There are red blurred lights on a blue background behind the fence netThere are red blurred lights on a blue background behind the fence net
Твёрдый серебристый металл, соединение железа с определённым количеством углерода.