本文档说明了最新的费用结构。
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本文档简要介绍了该项目，并说明了成为 API 柴油机尾气处理液授权销售商以及使用 API DEF 认证标志需满足的要求。
本文档提供了一系列分步说明和屏幕截图，用以帮助用户使用在线申请系统和进行许可维护。
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