舍棄式快速鉆頭(D×3點數(shù)) C25-SD14.5-42L C25-SD15.5-45L C25-SD16.5-48L C25-SD17.5-51L C25-SD18.5-54L C25-SD19.5-57L C25-SD20.5-60L C25-SD21.5-63L C32-SD22.5-66L C32-SD23.5-69L C32-SD24.5-72L C32-SD25.5-75L
