基本释义:

油沟，回油孔

网络释义

1)oil gallery,油沟，回油孔

2)return gallery,回油沟

3)main spill port,主回油孔

4)oil return hole,回油孔

5)oil gallery plug,回油孔塞

6)nozzle back leak duct;injector overflow,喷油器回油孔