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  • shenlong
    The high-density punching screen is composed of a central pipe, a high-density punching sleeve and a stainless steel ring. It has the characteristics of precise and controllable porosity, large...
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  • shenlong
    Petroleum special pipe is mainly used for oil, gas well drilling and oil, gas transportation. It includes oil drill pipe, oil casing, pumping pipe. The oil drill pipe is mainly used to connect...
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  • shenlong
    What is the composition of stainless steel? Fe: the basic component of stainless steel; C: Carbon has a dual character in stainless steel, on the one hand, stabilizing austenitic elements,...
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