But, if damaged surface, which will expose the steel surface and atmosphere reaction, the ego repair oxide "passivation," continued protection.
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On the other hand, if the surface interaction is not favourable, the quality and density of the carbon coating may be damaged.
在另一方面，如果表面相互作用，是不是有利的，质量和密度的碳涂层，可损坏。
Regularly check whether actions of inhalation, exhalation discs are flexible, and the sealing contact surface of leader and disc is damaged, if so, should be replaced immediately.
定期检查吸入、呼出阀盘动作是否灵活，导杆及阀盘接触密封面有无损坏，如有损坏应立即更换。
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