It's available in both indoor and NEMA 3r-rated outdoor enclosures, able to resist elements such as rain, sleet and ice. And it can be mounted on either a wall or pedestal.
Mortgage securities, perhaps, triple-A rated and arranged by Wall Street’s finest.
抵押证券，也许还是由华尔街天才们设计的，评级达到AAA级别。
3
The pressure relief valve can be mounted on an oil tank cover or a lateral wall of the transformer for protection in case of pressure of the oil tank in excess of the rated valve.