special accessories meaning in English

专用件
专用附件

Please refer to your contract for special accessories
购机时以合约为准
Shipbuilding . special accessories for marine fittings . stuffing box . general desigh features of the stuffing box
造船工业.船舶配件用专用附件.填料箱.填料箱通用设计特性
Special accessories allow reactions under extreme conditions and the development of novel synthesis protocols for organic compounds
专业的附件允许在极其恶劣的条件下发生反应以及有机化合物合成的新发展。