Beijing Jietaihongli Technology Co., Ltd. |
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200*200mm Kelly Square Head Used for Kelly Bar
Kelly Box / Kelly Stud / Kelly Square
Used for kelly bars and also for kelly bar repair or vairable
diammeter square head
Material :35CrMo
Model Size : 130*130mm;150*150mm;200*200mm;250*250mm
SANY type and Bauer type