后拉式皇冠钻

SEM125R3WD16M有效深度39mm[范围12.5-13]、SEM130R3WD16M有效深度39mm[范围13-13.5]、SEM136R3WD16M有效深度42mm范围13.51-14、SEM140R3WD16M有效深度42mm』【范围14-14.5]、SEM146R3WD16M有效深度46mm、[范围14.51-15]、SEM150R3WD20M有效深度46mm、[范围15-15.87]、SEM160R3WD20M有效深度49mm范围15.88-17]、SEM170R3WD20M有效深度52mm、[范围17-18]、SEW181R3WD25M有效深度55mm「范围18.01-19]、SEM190R3WD25M有效深度58mm、[范围19-19.99]、SEM200R3WD25M有效深度61mm[范围20-21]、SEM210R3WD25M有效深度64mm：范围21-22]、SEM221R3WD25M有效深度68mm【范围22.01-23、SEM230R3WD25M有效深度70mm』范围23-24]、SEM241R3WD32M有效深度73mm【范围24.01-25]、SEM250R3WD32M有效深度76mm』范围25-26]、SEM261R3WD32M有效深度79mm范围26.01-27]、SEM270R3WD32M有效深度81mm』范围27-28]、SEM281R3WD32M有效深度86mm范围28.01-29]、SEM290R3WD32M有效深度89mm范围29-30]、SEM301R3WD32M有效深度92mm[范围30.01-31]、SEM310R3WD32m有效深度95mm[范围31-32]