The environmental pollution with some heavy metals for twenty four surface soil samples collected from Qarun Lake and Wa......

<正> 世界灌溉排水委员会(ICID)秘书长弗朗姆杰,在其所著,《世界灌溉与排水》一书中,对埃及所用的Faiyum堰给予很高的评价。该堰具......