后底 meaning in English

aft head

The geological features of the houdidong au deposit , longjing , jilin province and its train of thought for ore prospecting
吉林省龙井市后底洞金矿床地质特征及找矿思路
Stone coal and its ash , dust , corn , chili , water in vat and boiled water were sampled from the inhabitants ' houses , and fluorine in these media was determined
采集居民家中石煤、石煤燃后底灰、室内降尘、玉米、辣椒、水缸水和开水，分析其含氟量，研究石煤燃烧时氟的迁移富集机制。