Ground Screw, Pipe Fititngs, Elbows manufacturer / supplier in China, offering J55 K55 N80 Casing Pipe API 5CT, API Casing Pipes Low Price, API 5CT Grade J55 Steel Casing Pipe and so on.
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The video content is the working process of spiral hammers which used to install ground screws.It makes
the installation more convinient and quickly.