Butterfly valve works

A butterfly valve is a valve that uses a circular disc as a starting and closing member and rotates with the valve stem to open, close and adjust the fluid passage. The butterfly valve's disc is mounted in the diameter direction of the pipe. In the cylindrical pass.....

Loach artificial breeding technology

Loach is a genus of fish and fish, and it is a warm-water fish. Mud body elongated, sub-cylindrical, more than 10 centimeters long; yellow-brown, with irregular black spots; small mouth, lower, have; meat light, delicate, delicious meat, rich in nutrition, according to analysis, the mud with the h.....

Leaflet Rhododendron Breeding Technique

Cuckoo is a special species with small leaves and a flowering period from March to April. Therefore, it can be inferred that the larger is likely to be Dongyang, and the possibility of Xiqiao is not excluded. Because the seed particles of azaleas are extremely small, they are very strict for sowing.....

High-yield Cultivation Techniques for Spring Spinach

Variety selection and planting of spring spinach at the sowing date should be done by picking up late-night round-leaf type spinach varieties. In the early spring, when the surface of the soil is thawed 4 to 6 centimeters, it should be sown as early as possible. According to the meteorological data.....