Гидравлическое масло национального стандарта No. 46 против износа, No. 32, No. 68, 200L для экскаваторов и инъекционных машин

以下是关于挖掘机用液压油46#和68#的中英文说明：

### 中文说明
液压油46#和68#是两种不同粘度等级的抗磨液压油，主要用于挖掘机等工程机械的液压系统。它们的主要区别如下：
- **粘度差异**：
- **46#液压油**：在40℃时运动粘度为41.4~50.6厘斯（cSt），流动性较好，适合低温环境。
- **68#液压油**：在40℃时运动粘度为61.2~74.8厘斯（cSt），油膜更厚，高温下润滑性能更稳定。
- **适用温度**：
- **46#液压油**：适合环境温度-10℃~40℃，常用于常温或寒冷地区的中低压液压系统。
- **68#液压油**：适应20℃~60℃的高温环境，多用于热带地区或高负荷、高压力设备。
- **性能特点**：
- **46#液压油**：低温流动性好，减少冬季启动磨损，节能效果显著，但高温下油膜易变薄。
- **68#液压油**：高温抗剪切能力强，适合连续高压工况，保护精密液压元件，但低温环境流动性差。
- **应用场景**：
- **46#液压油**：常用于机床、注塑机、轻载液压系统，以及北方冬季户外设备（如农用机械）。
- **68#液压油**：适用于挖掘机、起重机、高温炉窑液压系统，以及南方夏季或高温车间的工业设备。

### English Explanation
Hydraulic oil 46# and 68# are two different viscosity grades of anti-wear hydraulic oils, primarily used in the hydraulic systems of excavators and other construction machinery. The main differences are as follows:
- **Viscosity Difference**:
- **46# Hydraulic Oil**: Has a kinematic viscosity of 41.4~50.6 cSt at 40℃, providing better fluidity and suitable for low-temperature environments.
- **68# Hydraulic Oil**: Has a kinematic viscosity of 61.2~74.8 cSt at 40℃, with a thicker oil film and more stable lubrication at high temperatures.
- **Applicable Temperature**:
- **46# Hydraulic Oil**: Suitable for ambient temperatures between -10℃ and 40℃, commonly used in medium-low pressure hydraulic systems in temperate or cold regions.
- **68# Hydraulic Oil**: Suitable for high-temperature environments between 20℃ and 60℃, often used in tropical regions or high-load, high-pressure equipment.
- **Performance Features**:
- **46# Hydraulic Oil**: Provides good low-temperature fluidity, reducing wear during winter start-up and offering significant energy-saving effects. However, the oil film may thin at high temperatures.
- **68# Hydraulic Oil**: Offers strong high-temperature shear resistance, suitable for continuous high-pressure operations and protecting precision hydraulic components. However, its fluidity is poor in low-temperature environments.
- **Application Scenarios**:
- **46# Hydraulic Oil**: Commonly used in machine tools, injection molding machines, light-load hydraulic systems, and outdoor equipment in northern regions during winter (e.g., agricultural machinery).
- **68# Hydraulic Oil**: Suitable for excavators, cranes, hydraulic systems of high-temperature furnaces, and industrial equipment in southern regions or high-temperature workshops during summer.