附近的单身女人联系电话号码
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    Groove tube


    Special-shaped seamless steel pipe is the general name of seamless steel pipe with other section shapes except round pipe. According to the different shapes and sizes of steel pipes, it can be divided into equal wall thickness special-shaped seamless steel pipe (code D), unequal wall thickness special-shaped seamless steel pipe (code BD), variable diameter special-shaped seamless steel pipe (code BJ).

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    附近的单身女人联系电话号码