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单词
positive subdefinite
释义
positive subdefinite
次正定
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Unionidae
union intersection principle
unionized
unionized gas
union joint
union lever
union link
union-melt powder
union-melt weld
unionmelt welding
union melt welding
union metal
union mortgage clause
union nipple
union nut
union of sets
union of symbol
union operator
union purchase system
union reducer
union ring
union screw
union-screw coupling
union(-screw) coupling
union (screwed)bonnet (UB; SB)
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