1.燃烧系统:这些要求适用于蒸汽和热水发生器的油气发射系统。对于使用单独或组合燃烧器的多燃烧发射系统，这些要求将适用于所涉及的油和/或气体燃烧部件。在同时燃烧多种燃料的情况下，可能需要改进的安全措施，特别是在限制进入燃烧系统的热量输入和向单个燃料供应适当的空气方面。 2.燃料（.）3.操作（.）

1. Firing systems: These requirements apply to oil and gas firing systems of steam and hot water generators. For multifuel firing systems using separate or combined burners these requirements shall apply to the oil and/or gas firing part involved. Where several fuels are burnt simultaneously, improved safety measures may be necessary, especially in respect to limitation of heat input into the firing system and proper air supply to the individual fuels. 2. Fuels (.) 3. Operation (.)