feltn.毛毡；毡制品vt.制毡；使粘结vi.毡合动词feel的过去式和过去分词.feltedv.把 ... 制成毡(使 ... 粘结)adj.毡制的(粘结起来的)

1. Detection of furfurol content in transformer oil is an effective method to judge the aging degree of insulated paper in the transformer.
   检测变压器油中糠醛含量是判断变压器绝缘纸老化程度的有效方法。