XM31A型机械密封为单端面、多弹簧非平衡型结构。采用传动螺钉传动。
Mechanical seal type XM31A has a single seal face and multi-spring unbalanced structure, and is driven by screw transmission.
讨论螺钉、螺杆等紧固件的设计，包括传动螺杆和预加载紧固件。
Deals with screws and fasteners including power screw and preload fasteners.
讨论螺钉、螺杆等紧固件的设计，包括传动螺杆和预加载紧固件。
Deals with screws and fasteners including power screw and preload fasteners.
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