从这二种关系出发，进一步说明了严格控制变压器绝缘纸的含水量对延长变压器寿命的重要性。
From the above relations, the significance of strictly controlling the water content of transformer paper for prolonging the life of transformers is further mentioned.
采用耐电晕材料作为变频电机的漆包线绝缘是延长变频电机使用寿命的重要途径之一。
It is one of the important ways to use corona-resistant material as insulating material of the wire for inverter-fed motors.
为了降低水泥膨胀所引起的膨胀应力，延长瓷绝缘子的使用寿命，在胶装时一般在瓷体和水泥之间涂一层沥青缓冲层。
In order to reduce the expansion stress resulting from cement's expansion and prolong the life-span of porcelain insulator, a thin asphalt buffer layer is coated between the porcelain and the cement.
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