Then, as a normal user that has no knowledge of explosion protection system, how can he select a good product from the bad ones?

那作为并非防爆系统专业人士的普通用户，他怎么样才能够从中进行鉴别挑选呢？

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The paper discusses the design and operation of the gas safety and explosion protection system of roller hearth furnace in detail.

较详细地讨论了辊底式炉煤气安全防爆系统的设计与操作。

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If the supplier accepts an order without asking questions or only with rough information, you shall consider if the supplier has the qualification to make explosion protection system.

如果供应商不问问题或者只凭粗略了解就很爽快地把业务接下来，你就应该思考一下，这个供应商是否真的有资格来做防爆系统。

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