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to phrases
duct work
tech.
管道铺设
;
管道工程
;
管道敷设作业
;
风道工程
;
管道系统
;
管道设施
;
风管
duct-work
met.
管道工程
duct- work:
6 phrases
in 3 subjects
Construction
1
Shipbuilding
1
Technology
4
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