In view of the problems that underground information equipments are self-governed and(difficult) in maintenance,a kind of multifunction portable terminal based on WiFi was designed.

Through the analysis of the problems brought by increasingly increased requirement of logistic distribution,the authors put forward the framework of portable terminal subsystem in storage management system,and research on the role of portable terminal play in storage management and its application.

The wear on the gold plated contacts was analyzed between the spring terminals of connectors and printed circuit board(PCB)in failed portable communication terminals.