The second type is hinge shaft connection.
Installation method:
F 1= rectangular flange of head (for cylinder diameter d125);
F2= rear rectangular flange (applicable to cylinder diameter d125);
F3= head flange;
F4= tail circular flange;
F5= head Fa Lan;
F6= tail French blue;
F7= cylindrical bottom earring with knuckle bearing;
F8= cylindrical bottom earring with sleeve;
F9= hinge axis