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lchpy(½ð±Ò+1): thanks for your information 2011-10-21 15:37:08
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"Nanomaterial" means a natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and where, for 50 % or more of the particles in the number size distribution, one or more external dimensions is in the size range 1 nm - 100 nm. In specific cases and where warranted by concerns for the environment, health, safety or competitiveness the number size distribution threshold of 50 % may be replaced by a threshold between 1 and 50 %. Å·ÃËÍøÕ¾ÔÎÄÇë¿´£º http://ec.europa.eu/environment/ ... _recommendation.pdf |
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