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.
它既可在室内使用，又可在符合美国电气制造商协会3r标准的室外使用，能够防雨水、冰雹和冰等，可被安装在墙或底座上。
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。
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.
它安装在变压器的油箱箱盖或侧壁上，当油箱内压力超过规定值时，对变压器起保护作用。
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.
它安装在变压器的油箱箱盖或侧壁上，当油箱内压力超过规定值时，对变压器起保护作用。
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