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双线船闸
shuāngxiàn chuánzhá
el.
navigation lock
hydroel.st.
two-line lock
tech.
double lines of locks
;
double way lock
;
dual lines of lock
;
duplicate lock
;
twin lock
;
two-way lock
双线船闸
:
5 phrases
in 1 subject
Technology
5
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