简介:ImportofrareearthmetalandalloyinChinaup38%inthefirstquarteryear-on-yearAccordingtocustomsstatistics,Chinaimported27.67tonsofrareearthmetalsandalloysinMarch,valuedUSD427,200.ImportsfromJanuarytoMarchaccumulatedto100.4tons,up38.1%year-on-year.TheimportvaluetotaledUSD1.28millionduringthefirstthreemonths.DuringJanuarytomarch,Chinaimported65.9
简介:6."Developmentofhigh-performancerareearthluminescentmaterialforwhiteLED"projectbyFujianInstituteofResearchontheStructureofMatter(FJIRSM)passedtheacceptance"Developmentofhigh-performancerareearthluminescentmaterialforwhiteLED",akeyspecificS&TsubjectinFujianprovince,ledbyFujianInstituteofResearchontheStructureofMatter(FJIRSM)passedtheexpertsacceptanceonJanuary29,2015.
简介:结合可保煤矿的实践情况,随着矿坑开采的扩大、资源的日益紧张,矿坑开采水平逐年向下延伸进入深凹开采阶段,地质条件构造越来越复杂,断层越来越多,滑坡越来越大,边坡稳定问题越来越突出,给工作面台阶带来极大困难,为有效防范坍塌、片帮等事故。如何商榷最小工作面台阶宽度及自卸卡车运输调头方法等问题已成为重要目标。