彦機 Books

Gong gong chu shan.
Gong gong chu shan.

By Ji Yan

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危险货物道路运输培训丛书 危险货物道路运输企业专职安全管理人员培训教材
危险货物道路运输培训丛书 危险货物道路运输企业专职安全管理人员培训教材

By 彦機, 严季主编, 严季主编, 严季

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27 (p1): 第一篇 基础知识篇 27 (p1-1): 第一章 危险货物与危险化学品 27 (p1-1-1): 第一节 危险货物的定义、分类、品名及编号 34 (p1-1-2): 第二节 各类危险货物的基本概念及特性 51 (p1-1-3): 第三节 危险化学品与剧毒化学品 55 (p1-2): 第二章 危险货物道路运输包装常识 55 (p1-2-1): 第一节 危险货物道...

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If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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