• A tapered, often bullet-nosed piece of equipment often found on the bottom of a casing string.

    一种锥型通常圆头引导器形状器件,一般出现套管柱的下端。

    youdao

  • A tapered, often bullet-nosed piece of equipment often found on the bottom of a casing string.

    一种锥型通常圆头引导器形状器件,一般出现套管柱的下端。

    youdao

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