酸洗钝化                                            酸洗钝化

    
                  酸洗钝化                                                                酸洗钝化

    
                    酸洗钝化                                            酸洗钝化

    
                    酸洗钝化                                            酸洗钝化

    
                                 酸洗钝化                                                                                 酸洗钝化

    
                                 酸洗钝化                                                                                 酸洗钝化

    
                                 酸洗钝化                                                                                 酸洗钝化

    
                                 酸洗钝化                                                                                 酸洗钝化

    
                    酸洗钝化                                            酸洗钝化

    
               精铸件（失蜡法）                                精铸件（失蜡法）


                              精铸件（失蜡法）

    
                 型沙法铸件                                            型沙法铸件


                               型沙法铸件

         
                    酸洗钝化                                              酸洗钝化                                              酸洗钝化