When the U-shaped bent loop is broken, the nuts under the sleeper can be screwedoff and a new U-shaped bent loop can be assembled for restoring use.
当“U”形弯环断裂时，可将轨枕下面螺帽旋下，换上新的“U”形弯 环，即可恢复使用。
2
The utility model has the advantages that the gem can be replaced as long as the screw is screwedoff, and the user can select gems according to own hobby, thereby being very convenient.
本实用新型的优点是：只要旋下螺钉即可更换宝石，使用者可以根据自己的爱好选择宝石，非常方便。
3
The silicon parts in the generator should be often cleaned, checked and screwed in case that some parts are loose or fell off and then cause damage to the machine.