同系列不等于全部通用 Same series does not mean universal compatibility
YT系列型号名称相近，但内部结构、接口、料号、材料和制造版本可能不同；同型号不同批次也可能需要版本确认。 Similar YT names can conceal different internal designs, interfaces, part numbers, materials and versions. Even different batches of one model may need version checks.
外观相似不能作为采购依据 Similar appearance is not a purchasing basis
应同时核对主机铭牌、原件位置、料号、关键尺寸、接口、旧件照片和正式零件图或配套表。 Check machine nameplate, part location, number, key dimensions, interface, old-part photos and official drawings or compatibility tables together.
不确定时保持不确定 Keep uncertainty explicit
没有对应证据时不承诺通用，也不把其他型号配件作为直接替代。 Without supporting evidence, do not promise interchangeability or treat another model’s part as a direct substitute.
- 主机型号与序列信息 Machine model and serial details
- 原件料号 Original part number
- 关键尺寸和接口 Key dimensions and interfaces
- 正反面与安装位置照片 Front, rear and installed-location photographs
- 正式配套确认 Formal compatibility confirmation