A.1×7-15.20-1860 B.1×3I-8.74-1670 C.1×7I-15.20-1860 D.(1×7)C-12.70-1860
A.2根 B.3根 C.5根 D.7根
A.4.00mm B.5.00mm C.6.00mm D.8.00mm