The new amount of shrimp is commonly known as sand shrimp, which is omnivorous, grows rapidly, and has strong resistance to diseases. The suitable growth temperature is 19°C-33°C. The shrimp is not only bred in seawater, but also domesticated in freshwater ponds. 1. The choice of shrimp ponds is 3 mu-5 mu, with adequate water sources and no pollution. Seawater ponds are suitable for 15 mu - 30 mu with fresh water sources. The pool water is maintained at 1m to 1.5m with less silt, good drainage and drainage system, and aeration facility. 200 kg of quicklime or 30 ppm of bleaching powder was used for clearing the pond one week before the shrimp was put. 2. Incubation of basic feeds Shrimp ponds are treated with inorganic nitrogen fertilizers: Phosphorus fertilizer = 10:1, 1 kg/mu. Or pig feces fermented one week before the seedlings, 50 kg per mu to cultivate biological feed. 3, the transport of seedlings generally use nylon bags. A 30-liter nylon bag is filled with 1/3 water and 2/3 oxygenated. Put 50,000-60,000 tails per bag. When the water temperature is about 20°C, it can be transported for 10 hours to 15 hours. 4. Freshwater acclimated freshwater pond culture of seedlings should first domesticate the shrimp in freshwater. Methods are as follows: (1) Domestication of nursery ponds: In the nursery ponds, shrimps need to be gradually added with fresh water to reduce the salinity of the pool water to 1.003 (specific gravity), which takes one week. (2) Desalination in ponds: ponds with smaller areas need to be added with salt-halogen to adjust the salinity and the salinity in the nursery pool is basically the same, and then put into the shrimp seedlings. Do not add water within one week, then gradually add fresh water, then you can use fresh water. If the shrimp pond is too large, a holding tank with a depth of 60 cm to 70 cm can be dug on one side of the pond, and 0.5 to 10 000 tails per square meter. The inoculation of salt brine in the holding pool is the same as the nursery pond, and the freshwater is gradually added within one month until it is consistent with the external water supply. 5, shrimp stocking When the water temperature of about 18 °C, pool water 50 cm, transparency 30-40 cm per acre put 0.5 cm of shrimp 60,000 -10 million. 6. In the early days of daily management, the cultivation of biological bait is mainly used, and in the middle and later stages, the bait is mainly used. Late part of the live feed properly fed to fattening effect. It is advisable to feed within 2 hours. Breeding transparency is controlled between 30 cm and 40 cm. In the middle and later stages, the water is changed every 7 days to 10 days (each time 1/3). 7. In the late stage of disease prevention and cultivation, if the water is too rich, in addition to changing the water, 10 kg of lime can be applied per acre, and 0.2ppm of iodine preparations can also be used in combination with antibiotics to prevent shrimp diseases. 8. Harvesting amount The new shrimp has a habit of dipping sand, which is not easy to catch. Normally, fixed nets are used for fishing. That is, in the evening when the shrimp activity is strong, set down the net (online lighting), appropriate flushing to form a certain stream, attract shrimp into the net, once every hour, once in a row to capture.
Transmission Parts
This classification mainly includes the aluminum alloy die casting transmission parts using in Auto area,the raw material is aluminum alloy.
In the die casting process,higher specific pressure is required, so that higher filling speed can be obtained.which is beneficial for alloy to overcome mold filling resistance.and effectively fill each part of the cavity.The Casting General Tolerance is Grade GB-CT4.
Process Technology: High pressure die casting, Cold Chamber
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Flow Processes: Die casting, Degating to remove the residual of the gate, Polishing and Deburring to remove the burrs, Polishing to remove the parting line, flash,CNC Turning, Cleaning, Packaging, Storaging, Shipping
Control Measure: Incoming Material Test, First Article inspection, Routing inspection, Final item inspection, and Outgoing quality control
Inspection Equipment: CMM, Caliper, Plug Gage, Screw Gauge
Application: Auto Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo
Aluminum Transmission Parts,Die Casting Transmission Parts,Auto Transmission Parts,Malaysia Casting Transmission Parts
NINGBO ZHENHAI BOLANG METAL PRODUCTS FACTORY , https://www.bolangautoparts.com