用於階梯之移動輔助具
Patent | Movable aid for ladder |
Classification | Utility PATENT |
Patentee | CHEN JIA-CHING; WU YU-ZU; LIANG CHUNG-CHAO |
Abstract |
Patent | Movable aid for ladder |
Classification | Utility PATENT |
Patentee | CHEN JIA-CHING; WU YU-ZU; LIANG CHUNG-CHAO |
Abstract |