1. Performance and adaptive characteristics of dredging machinery 1. Large-scale engineering machinery, such as large dredgers, amphibious excavators, boat-clip dredgers, engineering excavators, etc., are suitable for river dredging, underwater dam building, lake impoundment, river dredging and other large-scale dredging. 2. New fish pond dredging pumps, hydraulic dredgers, small dredgers, amphibious dredgers, etc. are all working machines with water, which require a wide pond ridge, good site conditions for loading mud and long pipeline distance. It is suitable for dredging and reconstruction of medium and small intensive ponds. 3. Dry-pull dredging machine is suitable for intensive ponds, especially ponds with narrow ridges, widened ridges and raised ridges, and slope protection and shaping. However, the construction is seasonal, so it is generally necessary to seize the time to carry out the construction in winter when the pond is empty and the water is dry after the adult fish is caught. The price of the above-mentioned large-scale machinery ranges from tens of thousands to hundreds of thousands of yuan, and from about 2, yuan to 1, yuan. Dredging machinery basically belongs to two types, one is water-carrying operation, the other is dry-pulling and dry-digging operation, but the power is different, the distance is far and the distance is near, and the water depth is shallow. According to the analysis of geographical conditions, seasonal requirements and breeding characteristics, 3% of aquaculture farms are suitable for water-carrying operation, and 7% are suitable for post-drying construction and widening and heightening pond ridges. The farms are selected by machinery rather than machinery. Therefore, farmers should choose good machinery, and we think that the word "adaptation" is the key. To make a fuss about the word "adaptation", we should pay more attention to mechanical media and make more investigations and comparisons. Even if the mechanical effect of the investigation is very good, it may not be suitable for your pond conditions. On the contrary, the effect is not very good during the investigation, but the effect may become better combined with your conditions. The dredging market is a complex market, and any machinery is not omnipotent, and it has its adaptive side or unsuitable side. Analyzing the situation of farms and the economic affordability of fishermen, most of them require to buy small and medium-sized machinery that is practical, economical, light and easy to repair.