Light industrial products are closely related to people's daily lives, with a wide variety and numerous types. Due to the excellent comprehensive properties of steel, its presence is evident everywhere, showcasing its prowess. Here are a few examples:

Air Conditioners and Refrigeration Machines
The temperature control function of air conditioners and refrigeration units is primarily achieved through the evaporation and condensation of copper tubes in the heat exchanger. The size and thermal conductivity of the heat exchange tubes greatly determine the overall efficiency and miniaturization of the air conditioning and refrigeration systems. High-conductivity, non-standard copper tubes are used in these machines. By utilizing the good processing properties of steel, heat exchanger tubes with internal grooves and high fins have been developed and produced, which are used to manufacture heat exchangers for air conditioners, refrigeration units, chemical engineering, and waste heat recovery systems. This innovation can increase the total thermal conductivity of the new heat exchangers by 2 to 3 times compared to conventional tubes and by 1.2 to 1.3 times compared to conventional low-fin tubes. The technology has been adopted domestically, saving up to 40% of copper and reducing the volume of the heat exchangers by over 1/3.

Watch
The watches, timers, and devices with clock mechanisms currently produced by our company are predominantly manufactured using "clockcase brass." This alloy contains 1.5-2% lead, offering excellent workability suitable for mass production. For instance, gears are cut from long extruded brass bars, flat wheels are punched from strips of the appropriate thickness, and the clock faces, screws, and connectors are made from brass or other copper alloys. A large number of affordable watches are made from gilding metal (tin-zinc bronze) or plated with nickel silver (bronze). Some large clocks are crafted from steel and copper alloys. The hour hands of the British "Big Ben" clock are made from solid gilding metal rods, while the minute hands are crafted from 14-foot-long copper tubes.
A modern watch factory, primarily using copper alloys as raw materials, is processed through press machines and molds. It can produce between 10,000 to 30,000 watches daily with low costs.

※ Papermaking
In today's rapidly changing information society, paper consumption is substantial. While paper may seem simple on the surface, the papermaking process is actually quite complex, involving numerous steps and a variety of machines, including coolers, evaporators, pulpers, paper machines, and more. Many components, such as various heat exchangers, rollers, striking rods, semi-liquid pumps, and screens, are primarily made from steel alloys.
The long web paper machine currently in use sprays the processed pulp onto a rapidly moving fabric with fine mesh (40-60 count). The fabric is woven from brass and phosphor bronze wires, featuring a wide width, typically over 20 feet (6 meters), and must remain perfectly straight. The fabric moves over a series of small brass or copper rollers, where the moisture is suctioned out from below as the pulp-laden fabric passes through. The fabric vibrates simultaneously to bond the small fibers within the pulp. The large-scale paper machine's fabric dimensions are substantial, reaching up to 26 feet 8 inches (8.1 meters) in width and 100 feet (30.5 meters) in length. To ensure paper quality, stringent requirements are placed on the fabric material, demanding not only high strength and elasticity but also resistance to pulp corrosion; copper alloys are perfectly suited for the task.

※ Printing
Photographic plate-making is performed using copper plates in printing. After the polished copper plate is sensitized with light-sensitive emulsion, an image is formed on its surface. The sensitized copper plate must be heated to harden the emulsion. To prevent softening due to heat, a small amount of silver or arsenic is often added to the copper to increase the softening temperature. Subsequently, the plate is etched to create a printing surface with a pattern of raised and lowered dots.
On automatic typesetting machines, type fonts are arranged using brass type blocks to create plates, which is another significant use of copper in printing. Type blocks are typically made of leaded brass, and sometimes copper or bronze are also used.

※ Brewery
In the world of beer brewing, copper plays a significant role. Copper is commonly used for the interiors of malt vats and fermentation tanks. Some breweries have a dozen or more of these large vats, each holding over 20,000 gallons. To cool the fermentation tanks, it's common to use steel pipes for water-cooling. Steel pipes are also used to heat the beer during brewing with steam and to transport the liquid.
During the distillation process of Scotch whisky and other spirits, a steel-made distillation pot is commonly used. For whisky malt spirits, which require a double distillation, two large copper stills are needed.