mine service-life

基本解释

Part of his strength - and mine - came from you, the American people, to whom he dedicated his life of public service.
他的这种力量部分来自你们美国人民，为了你们，他愿意将全部生命奉献给公共事业。
The mine of Yinmusi Lead-zinc in Fengxian started construction in 1986, the 1990 production, design service life 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。
The utility model discloses a coal mine deformation-resistant air door, which has long service life and can reduce the production cost of enterprises.
本实用新型公开了一种延长使用寿命，降低企业生产成本的煤矿耐变形风门。
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