diff --git a/Model/Mapper/EntityMapper.cs b/Model/Mapper/EntityMapper.cs
index 983bf3d..5acb5c1 100644
--- a/Model/Mapper/EntityMapper.cs
+++ b/Model/Mapper/EntityMapper.cs
@@ -321,116 +321,6 @@ namespace Model.Mapper
         /// <summary>
         /// EquipmentDto → EquipmentEntity
         /// </summary>
-        public static EquipmentEntity ToEntity(this EquipmentDto dto)
-        {
-            if (dto == null) return null;
-            return new EquipmentEntity
-            {
-                Id = ParseId(dto.Id),
-                IsDel = dto.IsDel,
-                CreateTime = dto.CreateTime,
-                Code = dto.Code,
-                Name = dto.Name,
-                CategoryId = dto.CategoryId,
-                Type = dto.Type,
-                Brand = dto.Brand,
-                Model = dto.Model,
-                Specifications = dto.Specifications,
-                Manufacturer = dto.Manufacturer,
-                Supplier = dto.Supplier,
-                ImageUrl = dto.ImageUrl,
-                QrCode = dto.QrCode,
-                Description = dto.Description,
-                Department = dto.Department,
-                Location = dto.Location,
-                ResponsiblePerson = dto.ResponsiblePerson,
-                ContactPhone = dto.ContactPhone,
-                Custodian = dto.Custodian,
-                PurchaseDate = dto.PurchaseDate,
-                PurchasePrice = dto.PurchasePrice,
-                WarrantyExpireDate = dto.WarrantyExpireDate,
-                AcceptanceDate = dto.AcceptanceDate,
-                EnableDate = dto.EnableDate,
-                ServiceLifeYears = dto.ServiceLifeYears,
-                ScrapDate = dto.ScrapDate,
-                Status = dto.Status,
-                CalibrationStatus = dto.CalibrationStatus,
-                LastCalibrationDate = dto.LastCalibrationDate,
-                NextCalibrationDate = dto.NextCalibrationDate,
-                InspectionDate = dto.InspectionDate,
-                NextInspectionDate = dto.NextInspectionDate,
-                MaintenanceStatus = dto.MaintenanceStatus,
-                LastMaintenanceDate = dto.LastMaintenanceDate,
-                NextMaintenanceDate = dto.NextMaintenanceDate,
-                Remark = dto.Remark,
-                CreateBy = dto.CreateBy,
-                UpdateBy = dto.UpdateBy,
-                UpdateTime = dto.UpdateTime
-            };
-        }
-
-        /// <summary>
-        /// EquipmentAttachmentDto → EquipmentAttachmentEntity
-        /// </summary>
-        public static EquipmentAttachmentEntity ToEntity(this EquipmentAttachmentDto dto)
-        {
-            if (dto == null) return null;
-            return new EquipmentAttachmentEntity
-            {
-                Id = ParseId(dto.Id),
-                IsDel = dto.IsDel,
-                CreateTime = dto.CreateTime,
-                EquipmentId = dto.EquipmentId,
-                FileName = dto.FileName,
-                FileType = dto.FileType,
-                FileExt = dto.FileExt,
-                FileUrl = dto.FileUrl,
-                FileSize = dto.FileSize,
-                Uploader = dto.Uploader,
-                Remark = dto.Remark
-            };
-        }
-
-        /// <summary>
-        /// EquipmentCategoryDto → EquipmentCategoryEntity
-        /// </summary>
-        public static EquipmentCategoryEntity ToEntity(this EquipmentCategoryDto dto)
-        {
-            if (dto == null) return null;
-            return new EquipmentCategoryEntity
-            {
-                Id = ParseId(dto.Id),
-                IsDel = dto.IsDel,
-                CreateTime = dto.CreateTime,
-                ParentId = dto.ParentId,
-                Name = dto.Name,
-                Code = dto.Code,
-                Level = dto.Level,
-                Sort = dto.Sort,
-                Remark = dto.Remark
-            };
-        }
-
-        /// <summary>
-        /// EquipmentStatusRecordDto → EquipmentStatusRecordEntity
-        /// </summary>
-        public static EquipmentStatusRecordEntity ToEntity(this EquipmentStatusRecordDto dto)
-        {
-            if (dto == null) return null;
-            return new EquipmentStatusRecordEntity
-            {
-                Id = ParseId(dto.Id),
-                IsDel = dto.IsDel,
-                CreateTime = dto.CreateTime,
-                EquipmentId = dto.EquipmentId,
-                FromStatus = dto.FromStatus,
-                ToStatus = dto.ToStatus,
-                ChangeTime = dto.ChangeTime,
-                Operator = dto.Operator,
-                Remark = dto.Remark
-            };
-        }
-
         /// <summary>
         /// TemperatureBoxDataDto → TemperatureBoxDataEntity
         /// </summary>