The phrase “National Day”, which originally referred to the matter of national festival, can be traced back to the west Jin at the earliest stage. Lu Ji, a writer in the Western Jin Dynasty, once recorded in his article on the fifth class princes that “the National Day is only for its benefits, and the

A revolutionary progress has taken place in the field of pipeline in this century, namely “replacing steel with plastic”. With the rapid progress of polymer materials science and technology, the deepening of the development and utilization of plastic pipes and the continuous improvement of production technology, plastic pipes show their excellent performance incisively and vividly.

High density polyethylene (HDPE) is a white powder or granular product. Non toxic, tasteless, crystallinity 80% ~ 90%, softening point 125 ~ 135 ℃, service temperature up to 100 ℃; Hardness, tensile strength and creep are better than those of low density polyethylene; Good wear resistance, electrical insulation, toughness and cold resistance; Good chemical stability,

Wedge gate valve is a kind of gate valve. It is named because its sealing surface forms an angle with the vertical centerline, that is, the two sealing surfaces form a wedge. Generally, for gate valves with wedge-shaped sealing surfaces, the angles between the sealing surface and the vertical centerline are 2 ° 52 ‘,

DESCRIPTION 1. Size: 1/8″-4″ 2. Pressure: 150lbs 3. Surface: Black and Pickling treated 4. Type: Elbow 90° , Tee, Reducing Tee, Cross, Street Elbow 90° , Elbow 45° , Union, Plug, Bushing, Nipple, Cap, Socket, Coupling, Welding nipple, Barrel nipple and hose barrel nipple etc 5. Aplication: Use for petroleum, chemical, nuclear, power, ship, building,

Mid Autumn Festival, also known as Moon Festival, moonlight birthday, moon Eve, autumn festival, Mid Autumn Festival, moon worship Festival, yueniang Festival, Moon Festival and reunion festival, is a traditional festival among Chinese people. The Mid Autumn Festival originated from the worship of celestial phenomena and evolved from the worship of the moon on autumn