怀化专业从事物业保洁的兰先生因业务发展需要，于今天来我公司学习石材翻新护理技术（如图 ） 
                                                                             
                                                                                       地面石材开缝实操现场                                                   水牛机研磨地面实操
                                                                              
                                                                技术部龚经理手把手教兰先生晶面机的操作技巧                                  地面抛光护理实操现场