求翻译：负责(代理德国、美国知名的电机电动设备、滤油、净化仪器等产品)在石油行业客户的西南地区销售业务。直接面对客户（重庆气矿；重庆天然气净化总厂；蜀南气矿；南充炼油厂等）技术交流、设计解决方案、参与招标、提供产品。主要项目：蜀南气矿气站净油系统更新；重庆气矿管网改造工程；净化总厂气管法兰衔接技术项目等。年度销售额500万（人民币）。是什么意思？

Responsible for the (agent Germany and the United States well-known motor electrical equipment, oil filters, cleaning of instruments and other products) in the southwest of the oil industry customer sales business. Direct customers (gas mine in Chongqing Chongqing natural gas purification plant; shunan geyser; refinery in Nanchong, etc) solution for technical communication, design, participation in tenders and to provide the product. Main project: Sichuan gas station oil system update; gas pipe network reconstruction project of Chongqing; purification plant project of pipe flange connection technology. Annual sales of 5 million (RMB).