倒挂[dào guà]
词典hang upside down：倒挂。
词典drop away from：倒挂。
danci.911cha.com
（上下颠倒地挂着） hang upside down
倒挂
（指商品收购价高于销售价） drop away from:
例：购销价格倒挂。
The selling prices drop away from the state purchasing prices.
1. to reverse：大力扶持 to support with great efforts | 倒挂 to reverse | 底子薄 foundation is weak