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颗粒过滤法

59 bytes added, 02:35, 22 October 2017
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===颗粒介质、快速过滤器和过滤介质===
[[Image:granular high density carbon.jpg|thumb|right|200px|颗粒状高密度碳粒.]]
[[Image:filter sand.jpg|thumb|right|200px|滤砂,以袋装和托盘包装形式供应。它的二氧化硅含量为99.5%,只有极低的痕量金属和多环芳烃含量。这使得我们的滤砂成为用于井监测系统的最佳砂质。图片:[https://en.eijkelkamp.com/ Eijkelkamp Agrisearch Equipment BV.]]]
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