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china,Taiyuan,Shanxi,China China
The HWDP&#*9;s uses AISI ***5H alloy structural steel, the technique of production exactly carries
Our company may act according to the user the request to produce Kelly and hexagonal Kelly, the length us
Pipe joints and tube body strictly according to the selection criteria for welding zone work procedure comp
The drill collar is according to SY/T********7 and API **1 &#*4; Specification for Rotary Drill Stem Elem
The spiral drill collar is one of our product families. Three RH spiral grooves is made in outside surface o
Non-magnetic collar is a kind of low carbon chromium manganese steel, it is through the strict chemical compos
Lifting sub after high strength alloy structural steel heat treatment makes, its mechanical property achieves
A, B, C type of crossover subs is with the high strength alloy structural steel, makes after the heat treatmen
Persona de contacto Ms. Carolline Cheng
Dirección china, Taiyuan, Shanxi
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