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underseal是什么意思

underseal

美['ʌndəsiːl]  英['ʌndəsiːl]
vt.  底封(基层处理)
n.  底封
  近义词:undercoat,

英英释义

Noun
  1. seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion
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