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derivatives of rubber
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derivatives of rubber
Encyclopedia
理学
橡胶衍生物
释
derivatives of rubber
橡胶衍生物
天然橡胶经加成、取代、环化、裂解等化学反应而生成的橡胶类化合物。
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precious and endangered wildlife used for producing and trade
Precious Book of Ophthalmology
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precious metal
precious metal biological materials
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precious metal for nozzle
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