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update time：
2016-07-05 05:36 Valid to：Long-term effective
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SPECIFICATIONS: This model of a sunflower stem shows anatomy in cross, radial and tangential section. Shows epidermis,cork layer, phloem region, cambium, xylem region, pith and other important structures. MATERIAL:PVC PCS/CTN:2 DIMENSION(CM):42*32*42 G.W.(KG):7
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