diff --git a/db/jtDB.db b/db/jtDB.db
index 649277a..7c311cc 100644
Binary files a/db/jtDB.db and b/db/jtDB.db differ
diff --git a/widgets/main_window.py b/widgets/main_window.py
index f37d0ef..d71188d 100644
--- a/widgets/main_window.py
+++ b/widgets/main_window.py
@@ -3679,21 +3679,40 @@ class MainWindow(MainWindowUI):
                     # 获取API返回的新值
                     new_value = ""
                     if field_key and field_key in order_info:
-                        new_value = str(order_info[field_key])
+                        raw_value = order_info[field_key]
+                        # 处理None值，将其转换为空字符串
+                        if raw_value is None:
+                            new_value = ""
+                        else:
+                            new_value = str(raw_value)
                     
                     # 特殊处理线径公差
                     if field_name == "线径公差" and "bccd" in order_info and "tccd" in order_info:
                         bccd = order_info.get("bccd")
                         tccd = order_info.get("tccd")
+                        # 处理None值，只有两个值都不为None时才组合
                         if bccd is not None and tccd is not None:
                             new_value = f"{bccd} - {tccd}"
+                        elif bccd is not None:
+                            new_value = str(bccd)
+                        elif tccd is not None:
+                            new_value = str(tccd)
+                        else:
+                            new_value = ""
                     
                     # 特殊处理强度范围
                     if field_name == "强度范围" and "bqd" in order_info and "tqd" in order_info:
                         bqd = order_info.get("bqd")
                         tqd = order_info.get("tqd")
+                        # 处理None值，只有两个值都不为None时才组合
                         if bqd is not None and tqd is not None:
                             new_value = f"{bqd} - {tqd}"
+                        elif bqd is not None:
+                            new_value = str(bqd)
+                        elif tqd is not None:
+                            new_value = str(tqd)
+                        else:
+                            new_value = ""
                     
                     # 智能更新逻辑：如果新值不为空且与当前值不同，则更新；如果新值为空但当前值不为空，则保持当前值
                     if new_value and new_value != current_value: