This covers all grades of fuel oil and all types of combustion machinery, including main and auxiliary boilers.

该限制适用于所有燃油种类及所有燃烧设备，包括主锅炉和辅锅炉。

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This covers all grades of fuel oil and all types of combustion machinery, including main and auxiliary boilers.

该限制适用于所有燃油种类及所有燃烧设备，包括主锅炉和辅锅炉。

youdao