老司机精彩视频一区-亚洲日韩精品发布-五月天丁香伊人-天天爱天天做久久狼狼黑人

This machine is mainly used for aquaculture aerobic operations. The four impellers are separately placed on both sides of the main engine gearbox. It has good stability and strong aeration ability. It can effectively increase the amount of dissolved oxygen in the water and improve the water quality, forming a directional flow for fish, The growth of shrimp eels creates a good water environment. This machine is made of engineering plastics and stainless steel, suitable for seawater and freshwater aquaculture.

注：1.1與0.75的區別在于葉輪中心高及葉片入水深度不一樣