Let OC be the bisector of angle AOB.OC为AOB的角平分线.A perpendicular bisector of a chord passes through the centre and bisects the arc.弦的垂直平分线经过圆心,并且平分弦所对的两条弧.the angular bisector角平分线The article discusses the determination an...
Deep and large fault system played an important role in lithogeny and metallogenesis.深大断裂在成岩成矿中占重要地位.The metallogenesis is close related with the Caledonian - Indosinian regional metamorphism.加里东期~印支期区域变质作用与成矿密切相关.THE ME...