The following results have been obtained; (1) Pu is really a powerful carcinogenic radionuclide.
研究结果表明：（1）钚确系具有高度致癌毒性的放射性核素；
PU is a polymer with urethane segment repetitive structure unit formed after the reaction of TDI and PPG.
聚氨酯是由异氰酸酯与多元醇反应制成的一种具有氨基甲酸酯链段重复结构单元的聚合物。
It was developed by SEM that the surface of wool finished by hot-reacting PU is covered by resin, and there are bond points between fibres.
通过扫描电镜等实验手段研究发现，热反应型聚氨酯整理后的羊毛纤维表面被树脂覆盖，纤维之间存在粘接点。
The polyurethane (PU) is a polymer formed with urethane segment, as very high resistance to tear and abrasion, good resistance to ozone, oil and petrol, is widely used.
聚氨酯（PU）是一种具有氨基甲酸酯链段重复结构的聚合物，具有很好的耐撕裂和耐磨损性，良好的抗臭氧和耐油性，应用广泛。
The polyurethane (PU) is a polymer formed with urethane segment, as very high resistance to tear and abrasion, good resistance to ozone, oil and petrol, is widely used.
聚氨酯（PU）是一种具有氨基甲酸酯链段重复结构的聚合物，具有很好的耐撕裂和耐磨损性，良好的抗臭氧和耐油性，应用广泛。
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