• This article discuss the method to avoid the eutrophication problem of water body from the digging up the lake sediments which may lead to destroying the blance of nitrogen and phosphorus in water.

    底泥挖掘可能导致水体营养元素平衡破坏成因入手,探讨避免水体富营养化加剧的对策。

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  • The printer changes the traditional method acquiring the check-up date and number by lead letters radiated by X-ray in routine radiograph and makes check-up date and number regular and clear.

    改变常规X线照片铅字经X射线照射获得检查日期、检查(片号)等信息传统方法

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  • The printer changes the traditional method acquiring the check-up date and number by lead letters radiated by X-ray in routine radiograph and makes check-up date and number regular and clear.

    改变常规X线照片铅字经X射线照射获得检查日期、检查(片号)等信息传统方法

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