The earthworms, earthworms, blues, and grasses are called the four major fishes. In the breeding process, appropriate technical measures can be taken to produce unexpected increase in production. Strictly choose to keep broodstock. Choose natural origin, require health, good gonadal development. More than 6 kg of weight carp, more than 10 kg of carp, more than 15 kg of herring, more than 8 kg of grass carp. The broodstock's annual turnover rate should reach about 10%. Scientific clear the fish pond. The pro-fish pond should be easily drained and drained. There should be a 20-cm deep mud at the bottom of the carp and carp ponds. The bottom of the grass and grass carp pools should have little or no silt. An area of ​​1 to 5 acres, water depth of 1.5 meters. Clear the pool before stocking. Reasonable stocking. In the pond with salmon as the main source, 3 to 4 tails of squid and grass carp are raised per mu; the pond of the main squid raises 6~8 tails of grass carp; the pond of the main octopus raises the squid and grass carp Each of 2 to 3 tails; the main grass carp pool, Mu uptake of squid or squid 3 to 5 tail. The proportion of males and females of broodstock, oysters, grasses and grasses is generally 1:1 to 1.5. At the same time, 8 to 10 tails of squid and 150 or solifishes are stocked per acre to control the breeding of wild fish and large zooplankton. Strengthen feeding and management. Before stocking, the broth and squid brooding ponds should put in 500-700 kg of decomposed organic fertilizer per acre to cultivate plankton, and fertilize it later. In addition, sunny and warm weather should be fed bean cake to promote gonadal development. Herring broodstock is mainly fed with snails and oysters, supplemented with bean cake and other fine ingredients. Grass broodstock is dominated by green grass, ryegrass, hawthorn vines and other green materials, supplemented by fine material. If spring and autumn grass are insufficient, fine material is required. In order to keep the water fresh, autumn should be used for water injection. In winter, it is advisable to keep the water depth at 1.5 meters or more. Pay attention to appropriate production early. Determination of urine production date: After the weather warms, the minimum water temperature in the morning is stable above 18°C ​​for 3 consecutive days, and it is more appropriate when there is no strong cold air attack. Mature broodstock appearance characteristics: female abdomen inflated, the fulminate hole on both sides of the full, soft and elastic, reproductive hole relaxation, grass carp at the same time the abdominal scales loose, abdomen midline concave, ovary fall, there are like moving, oxytocin effect is good. The male fish can squeez out milky white semen and can be used when the water is spread. Normal females inject oxytocin chemotactic hormone 1,000 international units per kilogram of body weight, or LRH-A40 to 50 micrograms, males halved. Optimize the incubation process. The hatching water should be filtered with a filter to prevent the entry of floating debris and wild fish. Before each incubation, clean the hatching tank and hatching tank, provide suitable water flow during incubation, and diligently flip the water to check whether there are any accumulated egg seedlings in the bottom corner and clean it in time to maintain the water quality. End milling cutter For Manual Machine aftermarket
This item showed that our key milling cutter which can use for manual vertical key making machines
Product Features
1.Material: Top quality, high hardness and high wear-resistant carbide, ultra-fine particles, good wear resistance;
2. Manufacturering process: 5-axis automatic grinding center for mirror grinding, sharp edge, low noise; side fixed plane adopts full grinding process, compact installation.
3.Quality: The roundness of the handle is 0.002mm, which greatly reduces the blade yaw during high-speed rotation.
4. Features: accurate size, cutting edge size accuracy of 0.005mm, cutting key size precision; sharp edge
5.Advantages: Specially tested in 994 machine, sharp, can cut brass key and nickel silver key, test Honda original keys, STRATTEC key blanks, smooth edge, no burr, continue to use after processing 200 keys;
6. The Electronic key machine carbide tracer point has good conductivity, ensuring accurate detection, and will not damage the accuracy of the fixture and the spindle.
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