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长半径 chángbànjìng
bridg.constr. major radius
met. semi-major axis
oil long radius
椭圆长半径 chángbànjìng
avia. semimajor axis
曲率半径
navig. long radius
长半径: 18 phrases in 7 subjects
Automobiles2
Drilling2
General1
Oil / petroleum2
Polymers1
Space1
Technology9