Quartz glass tubing exhibits excellent low‑temperature resistance and is widely used in second‑ and third‑generation advanced lighting sources. Annual consumption of quartz glass amounts to 2,000 tons, supporting the production of 300 million halogen tungsten lamps and 15 million mercury lamps; it is also employed in the manufacture of xenon lamps, pulsed lamps, atomic‑spectrum lamps, and other indispensable light sources for modern technology. Composed of pure silicon dioxide, quartz glass is an essential high‑purity material in the electronics industry; crucibles for growing silicon single crystals, diffusion tubes for integrated circuit fabrication, and various laboratory vessels are all made from quartz glass. Fused quartz glass micro‑powder features a low coefficient of thermal expansion, high purity, and exceptional strength, making it the preferred additive for plastic encapsulants in integrated circuits. With its low spectral loss, quartz glass serves as the primary material for optical fibers. It also boasts a broad transmission range spanning from the ultraviolet to the infrared, along with outstanding resistance to rapid thermal cycling, rendering it an irreplaceable optical material in aerospace applications. Furthermore, quartz glass products—including UV germicidal lamp tubes, quartz glass fibers and doped quartz glass for military‑industrial applications, quartz glass ceramics for metallurgy, and acid‑resistant quartz glass piping for chemical processes—play a vital role in both the civilian economy and national defense.

　　Below, we will categorize the application fields of roughness meters based on their specific uses:

　　1. Passenger car manufacturing and auto parts processing

　　2. Machining of Mechanical Components and Transmission Devices

　　Mechanical components include: bearings, fasteners, stamped parts, threaded inserts and bolts, gears and racks, cam mechanisms, couplings, clutches, hydraulic tools, gear reducers, micro‑special motors, and speed‑regulating electric motors.

　　3. Metalworking equipment, machine tool accessories, and functional components

　　Metalworking equipment includes: lathes, milling machines, drilling machines, grinders, punch presses, sawing machines, electrical discharge machining (EDM) machines, wire EDM machines, laser machining centers, chamfering machines, rapid prototyping machines, horizontal‑spindle short‑table machines, specialized forming systems, automatic tapping machines, drill‑tap combination machines, honing machines, engraving machines, testing machines, and specialized test equipment.

　　4. Process Equipment

　　Carbide cutting tools, gear-cutting tools, threading tools, tooling systems, ceramic cutting tools, abrasives, lapping tools, grinding machines, wear-resistant components, fixtures, pneumatic fixtures, hydraulic fixtures, standard mold components, mold materials, electric and pneumatic tools, and hand tools.

　　5. General-Purpose Machinery and Metal Forming Equipment

　　Lifting equipment, air compressors, valves, pumps, fans, refrigeration equipment, thread-rolling machines, cold-rolling mills, marking machines, riveting machines, wire-drawing machines, and metal products.

　　6. Surface Engineering Treatment

　　7. Metallurgical refining, rolling, and forging equipment

　　Cold-rolled sheet, tinplate base sheet, aluminum alloy profiles, stainless steel sheet, cold‑rolled workpieces, rolled rolls (producing copper and aluminum foils), cold‑hard cast‑iron mirror‑finish rolls, and calendering rolls.

　　8. Pneumatic and hydraulic components, as well as pressure vessels

　　9. Mold casting, precision manufacturing

　　Plastic molds, stamping dies, cover‑body molds, die‑casting molds, melting equipment, casting equipment, iron castings, aluminum castings, non‑ferrous metal sand‑cast parts, carbon steel castings, stainless steel castings, alloy steel castings, and precision castings.

　　10. Printing, packaging, light industry, textile machinery, and medical devices

　　11. Petroleum, chemical, coal, cement machinery, and agricultural machinery

　　12. Grain and oil, food, beer machinery, and pharmaceutical machinery

　　13. Electrical, electrical control, and electronic communication equipment

　　14. Aerospace and defense industry entities

　　15. Colleges and universities, research institutions

　　16. Papermaking Industry

　　17. Industrial ceramics, piezoelectric ceramics, electrical porcelain, ceramic greases, porcelain enamel, frosted finishes, high-alumina ceramic rollers and rods

　　18. Rubber, epoxy resin, polyethylene

　　19. Fluid ducts, composite fiberglass thermal-insulated sound-damping air ducts

　　20. Crystal, silicon carbide, graphite, diamond film, magnet

　　21. Alloy doors and windows, door handles, seat components, the exterior of stainless steel cups and tableware, and faucet surfaces.

　　22. Cadmium-plated battery, telescope tube

　　23. Copper foil stationery, nickel–white copper pen tips, cemented carbide ball bearings, ball sockets, and mechanical pencil leads

　　24. Medical Care

　　25. Clothing-making equipment