1. 油管 (Oil Tube): 用于输送润滑油或液压油的管道，是发动机和液压系统中不可或缺的组成部分。例如，卡特彼勒 (Caterpillar CAT) E200B 挖掘机的油管，零件号 34333-00600，连接发动机的润滑系统。

Oil Tube: A pipe used to transport lubricating oil or hydraulic oil, an indispensable part of engines and hydraulic systems. For example, the oil tube of a Caterpillar CAT E200B excavator, part number 34333-00600, connects the engine's lubrication system.

2. 齿圈 (Gear Ring): 通常安装在飞轮或驱动盘上，与启动马达的齿轮啮合，用于启动发动机。例如，卡特彼勒 (Caterpillar CAT) E70B 挖掘机发动机的齿圈，零件号 0996581。

Gear Ring: Usually mounted on the flywheel or drive plate, it meshes with the starter motor gear to start the engine. For example, the gear ring of a Caterpillar CAT E70B excavator engine, part number 0996581.

3. 鼓风机电机 (Blower Motor): 空调和通风系统的核心部件，用于驱动风扇，提供驾驶室内所需的空气流动。例如，卡特彼勒 (Caterpillar CAT) 313B 挖掘机的鼓风机电机，零件号 150-2120，确保操作员的舒适性。

Blower Motor: The core component of air conditioning and ventilation systems, used to drive the fan and provide the necessary airflow inside the cab. For example, the blower motor of a Caterpillar CAT 313B excavator, part number 150-2120, ensures operator comfort.

4. 点火开关 (Ignition Switch): 控制发动机启动、运行和停止的关键电气元件。例如，卡特彼勒 (Caterpillar CAT) 320D 挖掘机的四线点火开关，零件号 255-2751，用于接通和切断电路。

Ignition Switch: A crucial electrical component that controls the starting, running, and stopping of the engine. For example, the 4 lines ignition switch of a Caterpillar CAT 320D excavator, part number 255-2751, is used to connect and disconnect the circuit.

5. 喷油器 (Fuel Injector): 将燃油以雾状喷入发动机燃烧室，与空气混合燃烧，为发动机提供动力。例如，卡特彼勒 (Caterpillar CAT) C4.4 发动机的喷油器，零件号 370-7287，确保燃油的有效燃烧。

Fuel Injector: Atomizes fuel and injects it into the engine's combustion chamber, where it mixes with air to burn and provide power to the engine. For example, the fuel injector of a Caterpillar CAT C4.4 engine, part number 370-7287, ensures efficient fuel combustion.

6. 液压轴向柱塞泵 (Hydraulic Axial Piston Pump): 液压系统的动力源，将机械能转化为液压能，驱动液压执行元件工作。例如，卡特彼勒 (Caterpillar CAT) 305.5E 挖掘机的液压轴向柱塞泵，零件号 423-0097，为挖掘机的各种动作提供动力。

Hydraulic Axial Piston Pump: The power source of the hydraulic system, converting mechanical energy into hydraulic energy to drive hydraulic actuators. For example, the hydraulic axial piston pump of a Caterpillar CAT 305.5E excavator, part number 423-0097, provides power for various movements of the excavator.

7. 控制器 ECU (Controller ECU): 发动机或整机的电子控制中心，负责接收传感器信号，控制执行器动作，实现各种功能。例如，卡特彼勒 (Caterpillar CAT) 330F 挖掘机的控制器 ECU，零件号 462-0007，管理发动机的运行。

Controller ECU: The electronic control center of the engine or the entire machine, responsible for receiving sensor signals and controlling actuator actions to achieve various functions. For example, the controller ECU of a Caterpillar CAT 330F excavator, part number 462-0007, manages the engine's operation.

8. 线束 (Wiring Harness): 将机器的各个电气部件连接起来，传输电力和信号的电线束。例如，卡特彼勒 (Caterpillar CAT) 312D 挖掘机的线束，零件号 305-4891，连接各种传感器和执行器。

Wiring Harness: A bundle of wires that connects various electrical components of the machine, transmitting power and signals. For example, the wiring harness of a Caterpillar CAT 312D excavator, part number 305-4891, connects various sensors and actuators.

9. 空调冷凝器芯体 (A/C Condenser Core): 空调系统中的热交换器，将制冷剂中的热量散发到空气中。例如，卡特彼勒 (Caterpillar CAT) 324D 挖掘机的空调冷凝器芯体，零件号 245-7911，是空调系统的重要组成部分。

A/C Condenser Core: A heat exchanger in the air conditioning system that dissipates heat from the refrigerant into the air. For example, the A/C condenser core of a Caterpillar CAT 324D excavator, part number 245-7911, is a crucial component of the air conditioning system.

10. 水泵 (Water Pump): 冷却系统的重要组成部分，用于循环冷却液，带走发动机产生的热量，保持发动机在适宜的工作温度。例如，三菱 (Mitsubishi) 4D32 发动机的水泵，零件号 094-7268，安装在卡特彼勒 (Caterpillar CAT) E70B 挖掘机上。

Water Pump: An important part of the cooling system, used to circulate coolant, remove heat generated by the engine, and keep the engine at a suitable operating temperature. For example, the water pump of a Mitsubishi 4D32 engine, part number 094-7268, is installed on a Caterpillar CAT E70B excavator.