简介:CHINAistheonlyoneoftheworld'sthreelarg-esteconomiesinwhichasignificantnumberofitsmostimportantcompaniesarelistedonsharemarketsoutsidedirectregulatorycontroloftheirhomecountry'smainfinancialadministration.AlmostallmajorU.S.companiesarelistedintheU.S.ThesameappliesinJapan.ButmanyChinesecompa-niesarelistedinHongKong,partofChinabutwithseparateregulationandcapitalmarketsfromChina'smainlandeeonomy.FurthermoreasignificantnumberofChinesecompaniesarelistedinLondonandtheU.S.
简介:对南钢生产的40mm厚800MPa级N800CF高强度水电钢进行了冷裂纹敏感性测试,并采用SMAW、GMAW和SAW三种方法对N800CF钢进行了焊接工艺评定。结果表明。南钢生产的N800CF水电钢预热80℃时可避免冷裂纹的产生,焊接接头综合性能良好。