A.2塊,2mm B.3塊,3mm C.2塊,3mm D.3塊,2mm
A.φ4mm,φ3mm B.φ3mm,φ4mm C.φ5mm,φ4mm D.φ4mm,φ5mm
A.1塊 B.2塊 C.3塊 D.4塊