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不稳定河床
bridg.constr.
unstable stream bed
eng.geol.
mobile channel
hydroel.st.
unstable channel
;
shifting bed
;
mobile bed
tech.
changing channel
;
erodible bed channel
;
mobile riverbed
;
shifting riverbed
;
unsteady riverbed
不稳定河床
动床
hydroel.st.
mobile channel
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