特点 Features：

该膨胀节是由两个波纹管，长中间接管以及大拉杆等零件构成，它能吸收管系任意平面内的横向位移。位移时大拉杆上的球面螺母绕球面垫圈转动，同时大拉杆还具有承受内压推力的能力。

This type of expansion joints are composed by components such as two bellows, the long middle adaptor tube and the large pull rod, which can absorb the lateral displacement in any plane of the tube system. During displacement, the spherical surface nut can rotate around the spherical surface washer on the large pull rod, while the large pull rod shall have the capacity to bear the internal pressure pushes.