选换挡空位
Neutral position for gear-selection and shifting
选-换挡执行机构
Drive select-shift mechanism
自动选换挡执行机构
automatic shifting execution mechanism
变换选择性映射
Transformation Selected Mapping(T-SLM
交换选择法
selection with interchange
离子交换选择性
Selectivity of ion exchange
热调换选路协定
hot swapable routing protocol
HSRP
弱磁选选铁
Iron separation by low intensity magnetic separation
市内电话电话号码配换选号
Selection or Change of Telephone Number
替换选择排序
replacement selection sort
变速换挡机构
Transmission shifting systems