They are green outputs of pollution free, innoxious, water proof, anti - fire, erosion resistance, fast color and non - deformation.

该产品无污染放射元素，对人体健康无害、能防水、防火、抗腐蚀、不退色、不变形，符合环保要求的绿色产品。

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Established mathematical model of evaluating free sand, erosion sand and sand skeleton output critical condition;

建立了评价游离砂、剥蚀砂和骨架砂产出临界条件的数学模型；

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They are green outputs of pollution free, innoxious, water proof, anti-fire, erosion resistance, fast color and non-deformation.

该产品无污染放射元素，对人体健康无害、能防水、防火、抗腐蚀、不退色、不变形，符合环保要求的绿色产品。

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The agency's water plan for 2012, which is set to be approved later this month, recommends 562 new projects developing new reservoirs, improving conservation, preventing erosion that would free millions of additional acre-feet.

ECONOMIST: Drought may force the state to take tougher measures

Congestion is indeed a big problem, but it must not be allowed to mask the seriousness of free-flowing traffic's contribution to pollution, climate change and the erosion of green spaces.

ECONOMIST: Excessive

But we also need to reverse the overall erosion in middle class security so that when this economy does come back, working Americans are free to pursue their dreams again.

WHITEHOUSE: Key Investments for Middle-Class Families