As shown in the treatment of direct contact bodies, this requires that the common normal to the surfaces not to pass through the pivotal axis of either the driver or the follower.

如直接接触物体的治疗表明，这需要共同垂直于表面的不通过任何一方的驱动程序或跟随的关键轴。

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Said base, said lever and said pressing part can be assembled together actively through springs, so said lever can be assembled on the base rotating around the pivotal axis supporting said springs.

所述基部、所述压紧部和所述杠杆借助于弹簧可活动地组装在一起，使得所述杠杆可绕着支撑所述弹簧的枢转轴可转动地装配在基部上。

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The pivot mounts allow the pivotal movement of the protective housing relative to the pivot mounts and about horizontal axis AA.

所述枢轴安装座允许所述保护性外壳相对于所述枢轴安装座并围绕水平轴aa进行枢转运动。

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