况且，要它长时间的保持白色外观本身就会产生一些问题，因为在这块房屋外露的部分进行油漆粉刷是很难进行定期的维护保养的。
Maintaining a white finish over a length of time would present its own problems as a paint finish on such an exposed part of the house could require regular maintenance with difficult access.
NCS专业人员精于保养技术，这可以延长币的生命，作为一种附加值，通常也提升了他们的外观。
The professionals at NCS are skilled in conservation techniques that can prolong the life of the COINS in your collection and, as a side benefit, often enhance their appearance.
保养简易，外观精美。
NGC将不就任何基于外观审验导致的保养服务进行收费。
There will be no charges assessed to the submitter for conservation service performed in conjunction with an Appearance Review.
NGC将不就任何基于外观审验导致的保养服务进行收费。
There will be no charges assessed to the submitter for conservation service performed in conjunction with an Appearance Review.
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