对于其中一些具有标准J2EE特征，而一些又有特殊要求的情况，则必须提供同时满足这两组要求的提供程序——而这就增加了复杂性。
In the case where some of these are standard J2EE in nature and some are special in some sense, then a provider that satisfies both sets of requirements must be provided — adding to the complexity.
本文简要介绍了锅炉的PED认证的一般程序和PED指令中对于锅炉的一些特殊要求。
A brief introduction of the general procedure and specific requirement for boiler in the PED Directive is state in the article.
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