两翼扩底钻头
可根据需求调节扩底直径；
配合捞砂斗或清孔钻头一起使用 ;
箱式主体结构，结构简单，缩、扩灵活，维护方便 ;
适用地层：硬质土层、冻土层、中软岩层；
1.Adjustable cutting arms can meet the specific requirements of different reaming diameters
2.After reaming the bore hole, convey spoil with drilling bucket or cleaning bucket
3.Cutting arms are easy to spread and retract
4.It is easy to maintain the box-type structure
