单词	环的中心
释义	环的中心医center of a ring
随便看	chemical-set core chemical setting chemical sewage effluent chemical sewage sludge chemicals feed chemicals feed automation chemicals feeder chemicals feed pump chemicals feed system chemicals for electronic industry chemicals for EOR chemicals for fire-fighting chemicals for oilfield chemicals for oil recovery chemicals for papermaking chemicals for paper making chemicals for power plant chemicals for preservation of lychee chemicals from petroleum Chemicals,Hazardous chemical shearing chemical shell chemical shut-down chemical shutdown system chemical shut-down system