... bifocal lens ==> 双焦点透镜,双焦镜,双焦透镜 bifocal surface ==> 双焦面 bifolding door ==> 双折门 ...
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短语
共焦双曲面
[数]
confocal hyperboloid
;
confocal aggressiveboloid
焦糖色双面大衣
caramel reversible coat
焦糖色双面呢大衣
caramel reversible wool coat
焦糖色双面绒大衣
caramel double fleece coat
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