求翻译：质量轻的阀片和孔式阀座与磁性优化的喷油器总成结合起来，使喷油器不仅具有较大的动态流量范围，而且抗堵塞能力较强。 　　（4）下部进油的喷油器 　　是什么意思？

The quality of light valves and the seat of the hole magnetically optimized injector assembly combine the injector not only has a larger dynamic flow range, and the anti-clogging ability. (4) the lower part into the oil injector

Light weight of the valve and valve seat holes and magnetic-optimized fuel injector assembly, and the oil injection is not only has a large dynamic flow range, and resistant to clogging. (4) The lower the inlet of the fuel injectors

The quality light valve piece and the hole type valve seat and magnetism optimize the spray hole unit unifies, not only enable the spray hole to have the great dynamic current capacity scope, moreover anti-jamming ability is strong. 　　Lower part (4) enters the oil the spray hole 　　

Light weight block-hole valve and the valve plate combined with optimization of magnetic fuel injector assemblies, fuel injector not only have a large dynamic flow range and strong anti-blocking ability. 　　(4) lower oil injector