Beijing Jietaihongli Technology Co., Ltd.
Beijing Jietaihongli Technology Co., Ltd.
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Foudation Construction Piling Tool Friction Kelly Bar
kelly bar
A hollow bar attached to the top of the drill column in rotary drilling rig.
Usuall there are interlocking kelly type,frictional kelly type,full-interlocking kelly type and combined interlocking type.
Round and square type both can be tailored according to clients request.
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