radiator filler gun

例句：

1. 1. The radiator filler gun was used to inject the coolant into the engine.
   散热器填充枪被用来向发动机注入冷却液。
2. 2. The technician carefully filled the radiator with the correct amount of coolant.
   技术人员小心地给散热器加满了正确的冷却液。
3. 3. The radiator filler gun was a critical tool for maintaining the vehicle's temperature.
   散热器填充枪是维护车辆温度的关键工具。