"drainage"的搜索结果

drainage channel workers

标签: drainage,channel,workers

aerial photo of habitat restoration water drainage

标签: aerial,photo,of,habitat,restor

wetlands drainage pipes

标签: wetlands,drainage,pipes

drainage canal was manually constructed in order to provide a permanent waterway promoting

标签: drainage,canal,was,manually,co

drainage canal was constructed in order to provide a permanent waterway promoting the free flow of water

标签: drainage,canal,was,constructed

workers practicing vector control by digging a drainage ditch in order to help disperse standing water

标签: workers,practicing,vector,cont

this drainage canal was undergoing reconstruction in order to provide a permanent waterway

标签: this,drainage,canal,was,underg

saltmeadow cordgrass spartina patens watery marsh was traversed by a network of drainage ditches

标签: saltmeadow,cordgrass,spartina,

install drainage ditches to carry away sewage from the saida neighborhood of karada district in baghdad

标签: install,drainage,ditches,to,ca

haitian farmer walking by drainage canal in southern haiti

标签: haitian,farmer,walking,by,drai