气体安全

• Since april 1 , 1992 , all gas supply companies , gas installers and contractors must be registered with the gas authority ( the director of electrical and mechanical services ) in order to carry out their operations . in 1998 , seven gas supply companies
  由一九九二年四月一日起，所有气体供应公司、气体装置技工及工程承办商均须向气体安全监督（机电工程署署长）注册，方可从事与气体有关的业务或工程。