Features：
Option prolong straight bucket shell can avoids drilling hole inclined;
Choose conical shell type can accelerate dumping, increase of efficiency;
Ventilation pipe shaft inside prevents vacuum; add collar plate according to working conditions;
Remark:
Cutter and Bottom Custom: Single and Double design as Customer demand;
Kelly Box Size: Kelly box size based on the kelly bar, like 130*130, 150*150,200*200 etc;
All measurements are in millimeters, weight in kilograms.
Kelly Bar:
Features：
Option prolong straight bucket shell can avoids drilling hole inclined;
Choose conical shell type can accelerate dumping, increase of efficiency;
Ventilation pipe shaft inside prevents vacuum; add collar plate according to working conditions;
