Dear All Customers,Good day!Chinese New Year(Our Spring Festival) is coming soon, Our company will be closed for our Chinese Spring Festival from 17-Jan-2023 to 30-Jan-2023.Any questions or inquiries, please email info@granfoo-cn.com. We will check and reply to your inquiry in time. You can also con

1. Refraction of water and selection of optical systemSince the refraction of water is greater than that of air, the viewing angle of a TV camera is 1/4 narrower in water than in air. for three-quarters of the air. In order to observe the subject in a wider range, the camera of the underwater TV mus

In recent years, global internet transportation has generally replaced satellites with transoceanic submarine cables to ensure transmission speed and save operating costs. So how are submarine cables made? How is the laying process? Here are some basics about submarine cables.Manufacturing materials

Professional underwater cameras are widely used in some industries, and the functions and functions of underwater cameras are also different. Today's high-definition underwater cameras are mainly used for underwater work such as fishery and marine resources industry.Meaning: Underwater camera is als