It is of built-in type, single seal face, single spring and unbalanced type with hook spring transmission, and the direction of rotation of spring depending on that of axis.
内装式、单端面、单弹簧、非平衡型，带钩弹簧传动，弹簧旋向与轴旋向有关。
Mechanical seal type XM31A has a single seal face and multi-spring unbalanced structure, and is driven by screw transmission.
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。
It is of externally-mounted type, single seal, single spring, unbalanced and shift transmission, and with strong anti-clogging ability.
外装式、单端面、单弹簧、非平衡型、拨叉传动，具有较强的抗堵塞能力。
It is of externally-mounted type, single seal, single spring, unbalanced and shift transmission, and with strong anti-clogging ability.
外装式、单端面、单弹簧、非平衡型、拨叉传动，具有较强的抗堵塞能力。
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