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poplar canker
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poplar canker
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农学
森林病害
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poplar canker
杨树溃疡病
树木枝、干局部皮层坏死,后期因坏死组织失水而稍有下陷,有时周围还产生一圈稍隆起的愈伤组织,溃疡病广义上除包括典型的溃疡病外,还包括腐烂病、枝枯病、干癌病等所有引起树木枝干韧皮部坏死或腐烂的病害。
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centered affine group
centered affine mapping
centered affine space
centered affine transformation
centered coordinate system
centered cubic number
centered difference
centered Euclid space
centered family of sets
centered hexagonal number
centered homographic transformation
centered moment
centered pentagonal number
centered polygonal number
centered process
centered quadric curve
centered quadric surface
centered random variable
centered rarefaction wave
centered rarefaction waves
centered rectangular lattice
centered sample
centered sequence
centered set
centered spherical system
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