请高手把以下一段话翻译成英语,不要机器翻译的。谢谢!
1, the primary earth connection of the machine(at the supply input of the machine)must be connected to a good quality,electrically clean earth
2,clearance for air flow from electronics cabinet
3.Surges above a maximum of 265v are not permitted,and the supply must be clean-free of spikes.
4.outside the EEC and where local regulations permit,the input may be taken from 2 different phase lines of a multiphase supply.the voltage between these lines must conform to the above limits.the voltage from each line to earth must never exceed 265V
5.the boxed datum identifiers refer to the feed datums used in the appropriate feed option drawings