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地下管网
ecol.
underground pipe system
eng.geol.
underground pipe network
tech.
underground utilities
地下管
道
网
tech.
underground
pipe
net
;
underground
pipe
network
地下管
线
网
tech.
subterranean
pipe
network
地下 管 网
:
8 phrases
in 3 subjects
Architecture
1
Bridge construction
1
Technology
6
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