绍兴上虞区新昌县壳牌320齿轮油-润滑脂经销320号齿轮油中的“320”指的是其粘度等级‌。在工业上常表示为VG320，‌意为该油品在40℃时的运动粘度约为320平方毫米每秒（mm²/s）‌。它主要由石蜡级基础油制成，并添加了极压抗磨剂、抗氧化剂等多种添加剂，外观通常为深色液体。其主要特性包括良好的‌抗磨损性、抗氧化安定性、抗腐蚀性和抗泡沫性‌，能够在较宽的温度范围内保持稳定的润滑性能must be translated as foam. The "320" in gear oil No. 320 refers to its viscosity grade. In industry, it is often denoted as VG320, indicating that the oil has a kinematic viscosity of approximately 320 square millimeters per second (mm²/s) at 40°C. It is primarily made from paraffin-grade base oil and includes additives such as extreme pressure anti-wear agents, antioxidants, and others. The appearance is typically a dark liquid. Its main characteristics include excellent anti-wear properties, oxidation stability, corrosion resistance, and anti-foaming performance, enabling stable lubrication performance over a wide temperature range