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to phrases
crown line
auto. 齿顶线
bridg.constr. 拱顶线
construct. 拱线
oil 锚顶浮标系绳
tech. 路拱线; 隆起线; 中凸线; 穹顶线
crown line: 8 phrases in 4 subjects
Bridge construction2
Drilling1
Metallurgy1
Technology4