甲种及乙种换地权益书投标办法
Letter A and B Tender System
乙种换地权益书期龄轮候制度
letter b tender vintage system
换地权益书簿
commitment transfer register
串接交换交换
tandem switching exchange
换地权益的加权累积期龄
weighted aggregate ages of entitlement
强奇异交换交换子代数
strongly singular maximal abelian self-adjoint sub