求翻译：我们所说的喷油嘴清洗大多洗的是喷油嘴内部的杂质，以及清洗液由喷油嘴喷入燃烧室起到的清洁作用。喷油嘴头部暴露在外面的部分则会被积碳所附着(直喷发动机的喷油嘴可能会严重些，因为喷油嘴所处环境较恶略，更容易出现积碳)，如果是免拆打吊瓶是无法将其清除的。是什么意思？

We are talking about the fuel injector cleaning mostly wash impurities within the fuel injector, clean and the cleaning liquid sprayed by the injector into the combustion chamber play the role. Injector nozzle head exposed part will be carbon deposits are attached to the engine (direct injection may

We have said most of the fuel injector cleaning the inside of the nozzle, as well as WASHER FLUID impurities from the nozzle to the combustion chamber to the cleaning action. The injector head exposed to the outside of the portion of the carbon will be the attached (direct injection engine of the fu