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system pipe
hydroel.st. 配水管道
system pipe
: 235 phrases in 25 subjects
Agriculture1
Architecture2
Bridge construction1
Desert science1
Drilling1
Ecology5
Electronics6
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Geophysics1
Hydraulics1
Hydroelectric power stations10
Management1
Mechanics4
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Mining1
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Plastics1
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Refrigeration21
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Space1
Technology147