The sixth edition also contains general revisions and a new annex regarding protection levels for explosive equipment.

第六版还包括一些普通修订和涉及爆炸性设备的保护等级附件。

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The sixth edition also contains general revisions and a new annex regarding protection levels for explosive equipment.

第六版还包括一些普通修订和涉及爆炸性设备的保护等级附件。

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