An absorbent garment has an absorbent assembly disposed within a garment shell configured for encircling the wearer’s waist. The method comprising culturing the adherent cells from the placenta or adipose tissue under 2 dimensional culturing conditions which allow cell expansion, the conditions comprising continuous passaging of the cells for at least 4 passages. A steering lock device locking and unlocking rotation of the upper shaft includes a lock housing guiding a cylinder in back and forth direction, and a lock bracket portion mounted in a shape of grasping the upper tube by the lock housing therewith.