No. 771, dated 01.09.2011
Profession demercurization. What do these people do? Why is mercury liquid and why is it dangerous for the human body? How is mercury pollution removed?
Author of the plot: Lyudmila Urusova
Негізгі бет Ғылым және технология Galileo. Mercury (demercurization)
Пікірлер: 1,7 М.