喷嘴针阀体是柴油机上精密偶件之一,尺寸小,精度要求高。它的质量好坏,直接影响到柴油机的性能及使用寿命。我厂在生产初期,曾使用内径千分尺测量12V180柴油机喷嘴针阀体的中孔,但只能测量孔径尺寸及锥度,由于测量误差较大而改用 Nozzle needle valve body is one of the precision parts on the diesel engine, small size, high precision. Its quality is good or bad, a direct impact on the performance and life of the diesel engine. I plant in the production of early, had used diameter micrometer measurement 12V180 diesel nozzle needle body in the hole, but can only measure the aperture size and taper, due to large measurement error and use instead