1. The refrigerant in the air conditioner absorbs heat in the evaporator, and then transmits it to the compressor through the copper tube, and then dissipates heat through the condenser, and returns to the evaporator cycle. The thermal and electrical conductiv...

The principle of copper tube refrigeration in air conditioning is to use the thermal conductivity and corrosion resistance of copper tubes for refrigeration...

What is precision steel pipe: Precision steel pipe is a kind of high-precision internal and external bright seamless steel pipe material after cold rolling treatment...

In copper alloys, white copper is widely used as corrosion-resistant structural parts in shipbuilding, petroleum, chemical industry, construction, electric power, precision instruments, medical instruments, Musical Instruments and other departments because of ...

Copper pipe is also known as copper pipe. A type of non-ferrous metal pipe, is pressed and drawn seamless pipe. Copper pipe has the characteristics of good electrical conductivity, thermal conductivity, conductive parts of electronic products and the main mate...

Because of the characteristics of copper itself, it is very easy to rust in places where the environmental humidity is relatively large, and the problem will be smaller if we often use it, but if it is placed for a long time, it will lead to copper damage...

Copper rod is a very practical pipe parts, now in many places the pipe will choose practical brass pipe, mainly because brass pipe is a very durable pipe, and very reliable....

What is copper? Copper is named for its purplish red color, is a relatively pure copper, it is not necessarily pure copper, generally can be approximately considered to be pure copper, electrical conductivity, plasticity are better, but the strength, hardne...

he purpose of heat treatment after forging of large forgings is to prevent white spots and hydrogen , improve the internal organization of forgings, eliminate forging stress, reduce hardness and improve cutting performance, so that it can obtain good mechanica...

Promote the optimization of steel industry structure, transform and upgrade traditional process technology, and reduce energy consumption....

The CSRC said it will further introduce measures to stabilize expectations and confidence and stimulate the vitality of the bond market. Adhere to the bottom line thinking, do a good job in real estate, urban investment and other key areas of risk prevention a...

It is expected that the national steel billet price consolidation is stronger today....

Recently, the overall operating rate of iron and steel enterprises is at a high level, and production has rebounded. In mid-June, the key statistics of steel enterprises daily production of 2,262,700 tons of crude steel, an increase of 1.42%. Since June, the a...

It is expected that today's southwest construction steel morning price or stable operation....

The total inventory of building materials in the Beijing-Tianjin-Hebei leading market this week was 789,500 tons, an increase of 13,200 tons from last week, an increase of 1.7%; It was 845,200 tons lower than the same period last year, of which the Beijing mar...

The slow recovery of the construction industry this year, coupled with the still complex and severe external environment, the spillover effect of policy withdrawal in major economies has increased, and there are many constraints to release domestic demand....

China's exports to the Middle East, Africa, South America and other places may have increased in May, but most likely slowed down in June. From the current order level. The significant increase in orders for cold series products in July and August, or the mont...

By comparing the inflow of long wood and plate and strip in the domestic market in the past five years, it can be seen that the inflow of plate and strip in the domestic market has been expanding its leading advantage over that of long wood. For example, the i...

Near the end of the week, futures spot rebound, transaction has a certain improvement. Over the weekend, the market sentiment is relatively stable, up and down the range is not big, the national building materials market price is expected to hold stable operat...

On May 25, the national construction steel turnover totaled 133870 tons, with a daily increase of 18.17% and a weekly decrease of 1.43%. The trading volume relative index, the national 57 increased by 8.8, the north 33 increased by 0.7, East China 92.7 increas...