求翻译：针阀和针阀体密封不良，造成喷油嘴雾化不良或滴油。这种故障可用细的氧化铬或牙膏，涂在针阀端的密封带上，但千万不要涂到圆柱部分，再将针阀插入针阀体，边敲边转直到密合。研磨石必须将氧化铬或牙膏洗去。是什么意思？

Needle valves and needle valve body seal is bad, causing the nozzle atomization bad or drip. This failure can be used a thin chromium oxide or toothpaste applied to the sealing of the needle valve side to bring, but do not painted to the cylindrical part, and then insert the needle valve needle valv