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non-return-flow
 non-return flow
auto. 单向流动; 直流
| water tunnel
 water tunnel
eng.geol. 引水隧道
nautic. tech. 水漏斗
tech. 有水隧洞; 供水隧洞; 供水隧道; 水道; 输水隧洞; 输水隧道

to phrases
non-return flow
auto. 单向流动; 直流
non-return-flow water tunnel
: 4 phrases in 3 subjects
Plastics1
Technology1
Wind Energy2