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（1）描述商品或服务的特征；
（2）说明商标或服务的用途；
（3）商标权用尽；
（4）基于其他正当目的或理由的使用。
Always put the interests of customers first, focus on solving major intellectual property law issues, only to accept the value of the client commission, attention to their professional ethics and professional ideals, to become an expert intellectual property lawyers and make unremitting efforts.
