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closed conduit
agric.
地下排水管道
construct.
暗〔封闭式〕管道
el.
封闭导管
el.mach.
封闭管道
eng.geol.
暗管道
hydroel.st.
暗沟
;
封闭式管道
tech.
密闭管道
;
封闭
式
管道
;
封闭管渠
;
暗渠
;
暗管
closed conduit
:
6 phrases
in 1 subject
Technology
6
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