1. By 2005, all the gas stations, main oil storage tanks and the oil refinery enterprises in the city should have installed hermetical oil gas recovery facilities. 
   2005年前，全市加油站、主要储油库及炼油企业要实现油气的密闭回收。

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• 1. 密封的
  hermetic 密封的...hermetical 密封的...hermetically 密封地
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