求翻译：它用于分开式燃烧室中，即预燃室和涡流室中。在轴针式喷油嘴中可将轴针头部做成不同的形状来适应燃烧室对喷油雾化的要求。轴针头部做成两个相对的截锥形时，当针阀抬起时，燃油经过喷孔和轴针之间的环形间隙喷出。形成中空的圆锥形喷雾。是什么意思？

-It is used to separate the combustion chamber, the Ante-Chamber and eddy currents in the room. The pintle injector axis of needles can be made in different shapes to accommodate demand for fuel injection spray combustion chamber. Axial needle made of two relative when the truncated cone shape, when