A.<1cm B.<1.5cm C.<2cm D.<2.5cm E.<3cm
A.Block術(shù) B.Sehapayak術(shù) C.Kaubchandani術(shù) D.Pigon術(shù) E.Mile’s術(shù)
A.6~15mm B.15~30mm C.20~30mm D.15~20mm E.16~30mm