后拉式皇冠钻

SEM125R1.5WD16M有效深度23mm[范围12.5-13.5]、SEM136R1.5WD16M有效深度23mm[范围13.51-14.5]、SEM146R1.5WD20M有效深度30mm【范围14.51-15.87]、SEM160R1.5WD20M有效深度30mm[范围15.88-18]、SEM181R1.5WD20M有效深度36mm[范围18.01-19.99]、SEM200R1.5WD25M有效深度39mm【范围20-22]、SEM221R1.5WD25M有效深度41mm【范围22.01-24]、SEM241R1.5WD32M有效深度41mm【范围24.01-26]、SEM261R1.5WD32M有效深度48mm「范围26.01-28]、SEM281R1.5WD32M有效深度53mm[范围28.01-30]、SEM301R1.5WD32M有效深度56mm「范围30.01-32]