5 refers to the principle that there are many big fish in three layers of fishing nets, with fishing nets attached.

5 refers to a three-layer fishing net (which refers to a fishing net with a diagonal mesh of 1cm long), which can generally catch .5-2.5kg of fish, such as carp, grass carp, silver carp and herring. The principle of fishing net: there is lead on the fishing net. When the net is thrown into the water, the net will spread out and fall into the water. Because the lead is heavy and vertical, the fish will be locked in. After touching the net, the fish will instinctively struggle, causing the fish's tail, fins or gills to be entangled in the net wire, causing the fish to be unable to move.

1, 5 refers to a three-layer fishing net with many big fish

1, 5 refers to a three-layer fishing net that can generally catch .5-2.5kg of fish, such as carp, grass carp, silver carp, bighead carp and herring. 5 refers to the fishing net, which refers to the fishing net with a diagonal mesh of 1cm long. Of course, there may be some deviation in the specifications of different batches of fishing nets. .2cm）。

2. Fishing net specification: 1 refers to fishing net, and the diagonal mesh is 3 cm long; 2 refers to the fishing net, the mesh is 4.6cm； long by diagonal straightening; 3 refers to the fishing net, the mesh is 6 cm long by diagonal straightening; 4 refers to the fishing net, the mesh is 8 cm long by diagonal straightening; 6 refers to the fishing net, the mesh is 12cm； long by diagonal straightening; 7 refers to the fishing net, the mesh is 14cm； long by diagonal straightening; 8 refers to the fishing net, the mesh is 16cm long by diagonal straightening.

2. Principle of fishing net

1. Principle of fishing net: When the net is thrown into the water, the net will spread out and fall into the water. Because the lead is heavy and vertically downward, the fish will be put in, and the fish will instinctively struggle after touching the net, resulting in the tail, fin or gill being entangled in the net wire, resulting in the fish being unable to move.

2. functionally, fishing nets can be divided into gill nets, trawl nets, purse seine nets, net building nets and net laying nets. Ancient people used coarse cloth and hemp as raw materials to make fishing nets by bundling. This kind of fishing net has poor toughness and is perishable. With the development of fishery, fishing tools are also advancing with the times. Modern fishing nets are mainly made of polyethylene, nylon and other raw materials. This kind of fishing net is more durable and has higher fishing efficiency.