The prototype is widely used in mechanical manufacturing. For example, it is used as a forming angle model in the guide rail of a machine tool, and it is used as a special measuring tool for controlling the size in the car and grinding process. The thickness of the sample is usually 6-8mm, and.......
1. Rice main pest control agents and use techniques
(a) brown planthopper
1. Buprofezin. Recommended dosage: 112.5~187.5g active ingredient/ha; technical point of use: spray in the nymphal stage of the brown planthopper egg to the 1-2 year old larvae, the water layer shou.......
First, an overview WFB series of sealed self-priming pump is to fill gaps in the first product, the product has temperature and pressure, "a drainage", "lifelong self-absorption" and other functions. Currently producing stainless steel, polypropylene, cast steel, cast iron a.......
Today, Shijiazhuang construction steelprices rose slightly. Now, the market price of the Qinling Steel Q235 Φ6.5mm common line is RMB 3,810/ton, the market price of the Φ6.5mm Q23.......
False alarms often bring unnecessary trouble to the person in charge of safety and users, affecting their normal work and life. Especially for the police / security personnel, when the siren sounds, generally a large number of police forces will be mobilized to .......