Pull out before you want to open on the back of the circular disk lock plate with hooks, nutspanner remove round nut, reoccupy special pull the son will disc pull out.
拉出前，先要开圆盘背面的圆螺母锁片，用钩形扳手拧下圆螺母，再用专用拉子将圆盘拉出。
2
You can use a spanner to loosen the nut.
你可以用扳手来松这个螺母。
3
You hold the lower nut with one spanner while you undo the top nut with another one-do you see what I mean?