对烟机机组振动故障进行了测试分析，得出了结论及维修建议。

Test and analysis are carried out on the vibration trouble of flue gas fan units. The conclusion is obtained and the repair suggestion is put forward.

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对某乙烯厂乙烯裂解炉炉管断裂进行了现场检测，探讨了断裂原因，提出了维修建议。

Field examination of tube fracture of ethylene cracking furnace for a certain ethylene plant is carried out. The fracture reason is researched. The repair proposal is put forward.

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济南空调维修建议在清洗时，用吸尘器或长毛软刷，按散热翅片顺向轻刷，除去附着的埃尘和脏物。

Ji 'nan air conditioning maintenance recommendations in cleaning, vacuum cleaner or plush soft brush, press the fin forward brush, remove dust and dirt attached.

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