Fruit trees need 16 elements in their life processes, such as carbon, hydrogen, oxygen, nitrogen, phosphorus and potassium. Among them, carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium require the largest amount, called a large number of elements, and .......
Editor: With the increasing awareness of environmental protection and the gradual improvement of environmental laws and regulations, the problem of pump leakage has drawn more and more attention. In theory, the most effective measure to prevent pump leakage is to use a sealless pump. "On .......
In the first half of the year, the added value of the chemical industry increased by 18.9%, up 10.4 percentage points year-on-year, and 4.2 percentage points lower than the first quarter. Most chemical products prices continued to fall.
In the first half of the year, the output of c.......
In the first half of the year, the output of c.......
Abstract: Since the beginning of this year, a batch of international agencies such as the U.S. Department of Energy have expressed their willingness to continue to help and support China in promoting this new ground source heat pump technology with obvious energy saving and environmental prote.......
Now there is a very compelling accessory that measures the density and concentration of liquids that consist of two or three components: Anton Paar has introduced this special accessory for the new stainless steel enclosure frequency converters DPRn 427S and DSRn Played a complementary role. P.......
In routine maintenance, the following points need attention.
Explosion-proof luminaires, lampshades should be automatically shut off before power is turned on. Interlocking devices are due to the more complex and difficult to implement, most of the lights are only located in t.......
Electrochemical machining, that is, electrolytic machining, is a non-traditional cutting method that uses a metal to cause "anode dissolution" in an electrolyte to form a workpiece. In electrolytic machining, the tool (tool) is connected as a cathode to a DC power source, and the .......
[China Aluminum Network] Aluminum parts are soft, and they will be bent, deformed and fractured when rolled in the drum. Therefore, bending, deformation, or fractured parts are not suitable for rolling process technology.
Gear pump A rotary pump that transports or pressurizes liquids by changing and displacing the working volume created by the pump cylinder and meshing gear. Outer meshing double gear pump structure. A pair of intermeshing gears and pump cylinders separate the suction chamber from the discharge .......
Due to the high viscosity of crude oil in well with heavy heavy oil, the relatively poor crude oil properties and the poor performance of conventional water injection, the technical staff of Gudong Oil Production Plant in Shengli Oilfield has been proved via feasibility and field test in the pa.......
Submersible pumps can be placed under water, centrifugal pumps on the ground, that size should be the diameter of their connection. Submersible pump is a very wide range of water treatment tools. Unlike ordinary pumps, it works underwater, while most pumps work on the ground. Submersible pump .......