专利名称：Nutrient film technique
发明人：Douglas C. Harper,Derek C. Attenburrow 申请号：US05/868505
申请日：19780111
个人礼仪培训公开号：US04178716Arock you什么意思
公开日：
波兰人英文
19791218prior>中英网
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摘要：The prent invention relates to a method for operating a nutrient film plant growth technique so as to minimi the build up of one chemical in the circulating solution without a corresponding build-up of other chemicals, notably nutrient chemicals, therein. For example the feed of nutrient chemicals is in proportion to the feed of water to the solution, or the concentration of non-nutrients is maintained at a low level or discounted when asssing the amount of nutrient to add to the solution to maintain the desired nutrient level.shirt怎么读>朴海秀
申请人：FISONS LTD
soundgarden代理机构：Merriam, Marshall & Bicknell
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