氮本身就有直接的清洁效果，它可以分解积碳，而发动机里的这些积碳使移动零件固化而难以移动。
The nitrogen itself also has a direct cleaning effect, breaking down carbon deposits that can harden on an engine's moving parts.
固化：用化学方法使油墨或光油速变成固体。
Curing: The rapid solidification of ink OR varnish by means of chemical action.
用于加热或能量使涂层固化目的的房间或有限区域。
Chamber or enclosed area for the purpose of curing by heat or energy the coating.
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