TOC o h z u HYPERLINK l _Toc323135050 1特点 PAGEREF _Toc323135050 h 2 HYPERLINK l _Toc323135051 2产品寿命支撑策略 PAGEREF _Toc323135051 h 3 HYPERLINK l _Toc323135052 3外形描述 PAGEREF _Toc3231