2635 篇
1089 篇
264934 篇
3327 篇
6318 篇
2231 篇
2785 篇
537 篇
29663 篇
9813 篇
3163 篇
759 篇
2303 篇
1321 篇
449 篇
752 篇
1387 篇
2611 篇
2740 篇
4045 篇
[化学原料和化学制品制造业] [2025-06-18]
Cement, fine aggregates (sand), and coarse aggregates are combined with water to form the building material known as concrete, which hardens over time. In the construction of buildings, concrete is used to create foundations, columns, beams, slabs, and other load-bearing components. Various than cement, other elements are utilized as binders, such as lime for lime concrete and bitumen for asphalt concrete used in road building.
[化学原料和化学制品制造业] [2025-06-18]
Concrete fibers are short, discrete reinforcing materials made from steel, glass, synthetic, or natural substances that are added to concrete to improve its mechanical properties. These fibers enhance the tensile strength, crack resistance, durability, and impact resistance of concrete, helping to control shrinkage cracking and increase structural performance. Used in a wide range of applications, from infrastructure and transportation to mining and industrial flooring concrete fibers offer an efficient alternative or supplement to traditional reinforcement like rebar and mesh.
[计算机、通信和其他电子设备制造业,仪器仪表制造业] [2025-06-18]
Wireless microphones are audio devices that transmit sound without using physical cables. Instead, they use radio frequencies (RF) or Bluetooth technology to send audio signals to a receiver. These microphones are used in broadcasting, live events, sports, corporate meetings, education, and entertainment industries. Unlike wired microphones, which limit movement, wireless microphones offer freedom, convenience, and flexibility.
[信息传输、软件和信息技术服务业] [2025-06-18]
Coding & marking refers to applying codes, markings, or labels to products, packaging, or materials for identification, tracking, and compliance purposes. This process involves using specialized equipment, such as printers, coders, and markers, which use inkjet or thermal transfer techniques to apply codes or markings. The codes & markings can contain important information, such as batch numbers, codes, and logos, which help manufacturers comply with regulations, improve traceability, and enhance brand recognition.
[仪器仪表制造业,电气机械和器材制造业] [2025-06-18]
A compressor is a mechanical device that increases the pressure of gas by reducing its volume. It works by drawing in low-pressure gas and compressing it to a higher pressure, which is then used in various applications. Compressors are essential in many industries, including heating, ventilation, and air conditioning (HVAC), refrigeration, manufacturing and various others.
[纺织业,家具制造业,木材加工和木、竹、藤、棕、草制品业] [2025-06-18]
Commercial carpets are softcover flooring used in non-residential buildings such as corporate offices, hotels, schools, universities, and public offices. Commercial carpets come in rolls and modules. The carpet rolls are called broadlooms, and modular carpets are carpet tiles. Broadlooms and carpet tiles are discussed as market segments in this report.
[化学原料和化学制品制造业] [2025-06-17]
Global Compound Management Market Size and Share Analysis - Growth Trends and Forecasts (2025 - 2030)
[医药制造业] [2025-06-17]
Compounding chemotherapy system refers to a specialized pharmaceutical system designed to accurately and safely prepare personalized chemotherapy drug formulations. These systems automate or support the sterile mixing, dilution, and packaging of cytotoxic drugs according to patient-specific parameters such as weight, age, and cancer type. The goal is to minimize contamination risk, ensure dosage accuracy, enhance workflow efficiency, and protect healthcare workers from hazardous drug exposure.
[计算机、通信和其他电子设备制造业] [2025-06-17]
Cables and accessories connect two or more devices, allowing electrical signals or power to be sent from one to the other. In electronic devices, cables are commonly used for power and signal circuits. Undersea cables are used for long-distance communication. Power cables, particularly high-voltage cables, are used for bulk transfer of alternating and direct current power
[综合] [2025-06-17]
中央经济工作会议明确提出“扩大服务消费”。服务消费是总需求的重要组成部分,也是提振消费的重要着力点;服务业就业吸纳能力强,扩大服务消费是稳增长、稳就业、稳民生的重要抓手。但服务消费不同于商品消费,除了 商品消费的共性外,还存在收入弹性更高、供需同步性、耗时性、高度依赖人口聚集等特点。我国服务消费发展面临收入预期不稳、居民闲暇较少、流动人口城市化不足、供给不足等制约因素,有必要采取措施予以破解。本文分析了当前我国服务消费的总体现状和主要特征,梳理当前服务消费的主要制约因素,提出提振服务消费的基本路径。