Grab Guinness Records

Underwater fishing is dangerous, so it is very necessary to make preparations in advance. Before underwater fishing, please use lifting tools to prepare in advance. Next, follow Xiaobian to understand

Underwater cutting is another underwater project. With the rapid development of economy, underwater cutting is more and more widely used. What are the environmental requirements of underwater cutting?

(1) Investigate the landscape image, water depth, water temperature, flow rate and other environment of the operation area. It can be operated only when the wind force on the water surface is less tha