(指的是“异度齿”) (2)混合齿孔(Mixed perforation) 邮票因打孑L操作错误，以致误打在背面，经发现后再予翻正重打者，其结果往往造成复齿，称为混合齿。
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Big perforation of tympanic membrane led to mixed deafness, the sensitivity increased on ABR.
鼓膜大穿孔导致混合性聋，对ABR灵敏度增高。
The rules of perforation exposing process and combustion of mixed charge under different temperature, propellant type and web size are compared.
比较了不同的温度、药型和弧厚条件下，混合装药的破孔及燃烧规律。
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