... 直径分段减小的油管柱 graduated tubing ; tapered tubing 直径分段减小的套管柱 tapered casing string 用途:按绝对值减小的方向舍入某一数字。 ROUNDDOWN ...
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A tapered, often bullet-nosed piece of equipment often found on the bottom of a casing string.
一种锥型,通常是圆头引导器形状的器件,一般出现在套管柱的最下端。
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