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symmetrical section
hydroel.st. 对称断面; 对称段
met. 对称断面型钢
nucl.pow. 对称截面
wind. 对称状分段
symmetric section
bridg.constr. 对称截面
hydroel.st. 对称断面; 对称段
oil 对称剖面
symmetrical section: 21 phrases in 4 subjects
Bridge construction12
Metallurgy2
Nautical1
Technology6