Background picture of the box slide with a sense of technology

This is a gray background, box PPT background picture, with white lines on the box to outline, giving a sense of technology. Provide wide-screen and normal-screen jpg format image download;
Keywords: box, sense of science and technology, PPT background picture, gray slide background, line outline

This is a gray background, box PPT background picture, with white lines on the box to outline, giving a sense of technology. Provide wide-screen and normal-screen jpg format image download;
Keywords: box, sense of science and technology, PPT background picture, gray slide background, line outline