A drill can be divided into three categories: hand electric drill, Impact Drill, hammer drill. Minimum 1 hand Electric Drill: power, use scope is limited to wood drilling and when an electric screwdriver, part of the hand electric drill can according to the purposes to specialized tools, use and model more 2. The impact drill, impact drill impact mechanism have fangs and ball type two kinds Hand electric drill Hand electric drill . Ball type impact electric drill by the moving plate, plate, steel ball, etc. Dynamic plate through threads are connected to the spindle, with 12 steel ball; Fixing use pin fixed on the chassis, with 4 ball, under the influence of thrust, 12 steel ball along the four steel ball rolling, the carbide drill rotating impact movement, can on the brittle materials such as brick, block, concrete drilling. Release pin, make the fixing servo plate rotation, no impact, to make a general electric drill. 3. The hammer drill, electric hammer: can drill holes on any of the material, the most widely use scope. Three drill price from low to high alignment, function also is more, choose to knot cordless drill, rechargeable drill ZHE JIANG ULITE TOOLS MANUFACTURE CO.,LTD , http://www.ulitepowertool.com
Silverfish products processing
Through processing, the whitebait can become a high-quality fish product that sells well in both domestic and foreign markets, increasing the value of the whitebait, and thus enabling the fishery to achieve high returns. Therefore, processing is an important part of silverfish and fisheries. Because of the high protein content of the whitebait, the catches tend to deteriorate, requiring fresh ice to be used during the acquisition and processing. At present, China's whitebait products are mainly processed according to export standards and processed into 1,000-gram packages. There are also domestic-selling products that are processed into 500-gram, 250-gram, and 150-gram packages according to customer needs. Processing technology and technical requirements for exporting silverfish products: 1. Rinse the silver fish catches collected to the processing workshop, rinse them first, ie, place appropriate amounts of catch in large basins, vats, etc., and then set the containers. Under the tap, let the tap water rinse the catch, remove the floating leaves, water grass and other impurities while washing, and then put the washed white fish into another container for use. 2. Screening; The rinsing of the silverfish will be sorted according to the size of the specification. Generally, the silverfish are sorted by 3 to 10 cm, 10 to 12 cm, and 12 cm or more. Taibai Lake New Whitebait and other small whitebait are generally sorted by 4-5 centimeters, 4-6 centimeters, 5-7 centimeters, and 6-8 centimeters. The proportion of large, medium and small individuals in various specifications of silverfish is generally 20:60:20. For example, for a size of 5-7 cm, the minimum required ratio is 5 cm: 6 cm: 7 cm = 20:60:20. The increase in the proportion of large individuals is not limited. If the proportion of small individuals increases, the price will decline proportionally because it does not meet the product specification level. 3. Bagging The weighed silverfish are weighed as needed, packed in a plastic food bag, sealed flat, and placed in a turnover tray. Because during the processing of whitebait, weight loss will occur due to loss of water, it is necessary to properly cast some fish when bagging, so as to avoid the processed silver fish products from meeting the standard requirements due to insufficient weight. For example, l000 grams of packaging, generally vote 1050 grams of fish. Other various specifications and so on. 4. Quick-freeze The silverfish, which will be concentrated in the turnover tray, are immediately frozen in the quick-freezing workshop. - The room temperature in the freezer is kept below 38°C; freezing can be continued for 24 hours. If the quick-freezing temperature is too high, the silverfish may lose water due to a long freezing time and the quality and quantity of the whitebait products may be reduced. 5. Refrigeration The quick-frozen whitebait is placed in a prepared carton (usually 24 boxes per carton) and transferred to a cold room for storage. The room temperature in the refrigerator should be kept below 18°C.