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圆心角 yuánxīnjiǎo
bridg.constr. radius angle; centre angle; angle at the center
compr. center angle
hydroel.st. central angle
圆〔中〕心角
scient. central angle
圆心中心
archit. central angle
圆 心 角: 4 phrases in 3 subjects
General1
Scientific1
Technology2