protective sleeve短语¹³¹⁶²⁰⁺³ 基本例句 保护套 Protective sleeve provides a stationary surface to affix the insulation, allowing operation and maintenance of the valve without destroying the integrity of the insulated system. 保护套提供一个附加在保温材料上的固定的表面，允许在不损坏保温系统的整体性基础上进行阀门的操作和维护。 h6688