A.找箍器+外割刀+鉆桿 B.外割刀+套銑管+鉆桿 C.扶正器+找箍器十外割刀+鉆桿 D.扶正器+套銑管+外割刀+鉆桿
A.15 B.10 C.8 D.3
A.φ55mm×584mm B.φ83mm×600mm C.φ90mm×784mm D.φ0hnm×956mm