业主在现场安装工程开工前60天，支付我公司此部分合同总价（676台SUPERSTRUCTURE现场安装总造价）20％的工程预付款，我公司进场进行安装准备。我的翻译：The owner shall make the advance payment which is 20% of contract total price (the total cost of 676 superstructures installed on site)of this part 60 days before start installation on site, we approach the site and make the preparation for installation.
