丹江口大坝加高
heightening Danjiangkou Dam
丹江口大坝
the Danjiangkou dam
Danjiangkou dam
dangjiangkou dam
chemical grouting underwater
大坝
Dam
dams
Concrete
Large
darn
Safety
Keyworddam
Repair
dam safety monitoring
Concrete dam
strong earthquake monitoring
joint-grouting
concrete placement of dam
large dam
改建加高
Modification and heightening
堤防加高
heightening of embankment protection