基于wp手机平台的二等水准测量手簿。可自定义限差，自定义上点，自动步进点号，超限提醒，测站信息实时显示（BBFF所有读数，BF视距差，高差），所有测站信息成果输出。-WP mobile platform based on the two level of the manual book. Tolerance custom, custom, automatic step dot overrun reminder, station information is displayed in real t