key plan

• 平面布置总图,索引平面,索引图

key plan的用法和样例：

例句

1. It maintains an index plan in digital form of all leasehold lots and government land allocations as well as records of the land boundary surveys.
   该处为所有已批租地段及政府土地物业，备存一套数码形式索引图则，同时又备存所有地界测量的记录。