Illustration of a box with a sense of science and technology

This is a gray background, box PPT background picture, the box above the use of white lines outline the outline, given a sense of science and technology. Provide widescreen and ordinary screen two kinds of resolution jpg format picture download;

This is a gray background, box PPT background picture, the box above the use of white lines outline the outline, given a sense of science and technology. Provide widescreen and ordinary screen two kinds of resolution jpg format picture download;