建议：泵轴或防护套的表面硬度要达到60hrc。
Suggestion: pump shaft or protective set of surface hardness to achieve 60hrc.
该设备还包含置于细长轴的至少一部分上的保护套，且可相对于细长轴在远 端位置和近端位置上移动。
The device can also include a protective sheath disposed over at least a portion of the elongate shaft and movable relative to the elongate shaft between a distal position and a proximal position.
该设备还包含置于细长轴的至少一部分上的保护套，且可相对于细长轴在远 端位置和近端位置上移动。
The device can also include a protective sheath disposed over at least a portion of the elongate shaft and movable relative to the elongate shaft between a distal position and a proximal position.
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