Long designservicelife, double the life of lead acid batteries.
使用寿命长，为铅酸电池的一倍。
2
The mine of Yinmusi Lead-zinc in Fengxian started construction in 1986, the 1990 production, designservicelife of 19 years, has produced 11.
风县银母寺铅锌矿于1986年开始筹建，1990年投产，设计服务年限19年，至今已生产11年。
3
The designservicelife is based on the precondition of G-L Layer failure not occur, on the normal condition of balanced operation and routine maintenance.