Fishing is good for physical and mental health and is becoming more and more popular. However, accidents often occur when fishing. For this reason, six

First, fishing requires hooks, rods, floats, lines, and fish guards; second, there are tools for traveling, so that you can move in and out at

1. Overview of the development of the global marine special propulsion industry The main function of the marine propulsion is to use the ship’s engine

1. Intelligent technology At present, many shipping companies are beginning to organically integrate intelligent technology and propagation power propulsion technology, and use network information technology