开设子公司英语

To establish new subsidiary company.或者：To establish new subsidiary.都可以的，呵呵

set up a new subsidiary

总公司headoffice/headquarter分公司affiliate子公司subsidiary母公司holding companyaffiliate是分公司还是子公司我忘了分公司确实可以说成branch，比如China bank Shanghai branchsegment比department好像是要小顺序觉得是holding company>headquarter>affiliate/branch/subsidiary/department>segment>office >group>team

Parent Company 母公司 Affiliated company子公司 Head Office 总公司 Branch Office 分公司