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一、研制背景师生在进行课内课外生物教学科研实验活动时,常常需要应用小型网箱。由于实验的类型、规模、进程不同,需要使用的网箱规格和大小差异很大,但每一规格所需数量又不多,在市面上往往无法直接采购或定制到合适的定型产品,大多需要自行制作。许多人自行制作网箱时采用铁制框架,使用中很快就会锈蚀,且脱落的铁锈对实验水质将造成不利影响。若用铝合金型材或不锈钢管做框架,则制作成本较高,一般学校没有切割和
1. Development Background Teachers and students often need to use small-scale cages when conducting in-class extracurricular biological teaching research experiments. Because of the type, scale, and process of the experiment, the size and size of cages to be used vary greatly. However, the number of required sizes for each specification is limited. In the market, it is often impossible to directly purchase or customize to the right stereotyped products. Most of them require Make it yourself. Many people use their iron frames when making their own cages, and they quickly rust in use, and the rust that falls off will adversely affect the experimental water quality. If the frame is made of aluminum alloy or stainless steel tube, the production cost is higher, and the general school does not cut and