求翻译：其中的一个方面就是8球道（EBJ）等速驱动轴,它在外径回转直径缩小的条件下，同时还具备高效率、低发热的优异性能。是什么意思？

One aspect is the 8 Ball Road (EBJ) constant velocity drive shaft, its diameter narrowing in diameter under the conditions of rotation, but also with high efficiency, low heat of excellent performance.

One such aspect is 8ball road, etc. ) as soon as possible (EBJ Drive shaft, it in outside diameter roller diameter under the condition of narrowing, and at the same time is also equipped with high efficiency, low-heat from the outstanding performance.

A aspect is 8 lane (EBJ) constant speed drive shaft, it reduces in the outer diameter rotation diameter under the condition, meanwhile has the outstanding performance which the high efficiency, gives off heat lowly.

One aspect of which is 8 lanes (EBJ) constant velocity drive shafts, outer diameter swing out under the conditions and also has the excellent performance of high efficiency, low heat.

A respect among them is that 8 lanes (EBJ) drive the axle at the same speed, it is on condition that the external diameter is turned round the diameter narrows, still possess the high-efficiency, low excellent performance that generates heat at the same time.