(I) Breeding methods Indoor breeding and outdoor breeding can be used. 1. Indoor breeding. Available cylinders, boxes, pools, multi-layer feeding. The tank should be raised in a large-caliber tank and stamped on it. Adapted to small-scale farming. When the box is raised, food boxes, wooden boxes, etc. can be used, and the movable yarn cover can be placed on the top and can be placed on a multi-layer breeding frame. Adapted to feed with compound feed. The pool is made of brick and has a height of 40 cm and an area of ​​1.5 square meters. 2. Outdoor breeding. You should choose sunny and lee place. A fence can be built to dig a 4.6-meter-long, 0.6-meter-wide, and 0.8-meter-thick pit on the land, and a bamboo, plastic thin padding is used to grow a grid cover of 5 meters, a width of 1.2 meters, and a height of 1.5 meters. The north is closed. Stay on the south door for easy access. Drain ditches around to prevent the rain from soaking. This device is suitable for outdoor fecal culture. 3. Pool support. The pool is made of bricks with a depth of 1 meter and a length of 3 meters. The bottom of the pool is inclined. One end is 50 centimeters deep from the mouth of the pool, and the other end is 90 centimeters from the mouth of the pool. A drainage hole with a diameter of 8 centimeters is reserved at the bottom of the pool. Block the hole normally. The pool mouth is covered with fine sand to prevent the escape of insects and other natural enemies such as insects and ants. After the pool is built, fill the humus soil that has been sunburned or baked to a height of 15 centimeters. Fill the clean water (1/2 each) in the lower area and turn it into sewage after a long time. The slaughtered animal organs or fish intestines, etc., are chopped, placed on humus soil, and watered until it is wet. Treated larvae (fly maggots) are placed on humus; earthworms can be buried shallowly in soil. Always check that when the food has been eaten into a hollow or sink, without the original shape, it is timely to add new feed. Pool water should always be kept in contact with the humus soil on the plane to facilitate the activities of young children. In addition to the above mentioned breeding, several methods for the preparation of feeds are introduced: (1) Use the leftovers of agricultural and sideline products such as wheat bran, rice bran, distiller's grains, sugar sweets, bean dregs, slaughterhouse scraps, etc. to prepare the ingredients. (2) The use of animal excrement such as chicken excrement, cow dung, horse dung, pig dung, etc., is made by fermentation with cockroach. Requirements of raw materials, short, thin, fresh, moisture content of about 70%, before use, the two or more matrix mixed and evenly stacked in proportion, cover plastic film fermentation for more than 48 hours, before picking eggs, the pH value Requires between 6.5-7.0, peracid can be adjusted with lime, and overbase can be adjusted with dilute hydrochloric acid. Per square meter of pond area poured into the substrate feed 40-50 kg, into the fly eggs 20-25 grams. (3) Musca domestica larvae feed formulation: 150 grams of wheat bran, 50 grams of millet bran, 10 grams of milk powder, 2 grams of yeast powder, 450 milliliters of water, first mix wheat bran and millet bran, and then pour milk powder into hot water. In wheat bran, mix the yeast powder with a small amount of cold water and stir in it thoroughly. (B) Larval harvesting under artificial rearing When collecting larvae, the negative phototaxis of the larvae can be used to separate the larvae from the culture medium. The separation box is composed of a screen mesh, a dark box, and lighting. The screen is generally used with 8 meshes (when the agricultural and sideline products are used for the waste cultivation, the larvae are used more. fine). Strong light on screen. The separation box is generally 50 cm in length, width and height. When separated, the culture medium containing a large number of larvae is placed on the screen, the light source is turned on, and the culture medium is artificially stirred. The larvae see the light and drill down, and repeat until they are separated; finally, the mesh is shaken with a 16-mesh sieve to achieve cleanness. . The disposable oxygen mask is based on the product performance structure and composition. The products include trachea mask (adult/child), air duct, oropharyngeal airway, disposable oxygen mask with oxygen tube (adult/child), inflatable mask, silicon The mask, oxygen connecting tube (double head), oxygen nasal catheter (disposable) (adult/child) and connector are made of medical polyvinyl chloride, silicone rubber, and ABS plastic materials. The scope of application of the product is used when delivering oxygen to patients. Disposable medical nebulizer mask,PVC transparent oxygen mask nebulizer,adult type nebulizer mask Suzhou Xuanweicheng Biotechnology Co., Ltd , https://www.xwc-medical.com