| 摘要 |
A close tolerance pipe apparatus including a column of pipe lengths formed on their respective opposite extremities with male and female extremities which connect together to form joints. The female extremities are integral with the respective pipe lengths and are expanded to telescope over the respective male extremities. Stop means is secured in the female extremities of the respective pipe lengths and are disposed at a selected distance from the male end of such respective pipe lengths. The male extremities are externally threaded and the female extremities internally threaded whereby the male extremities may be screwed into the female extremities sufficiently far to abut the ends of the male extremities against the respective stop means to thereby provide an overall length for the total pipe column which is the cumulative distance between the stop means and male ends of the respective pipe lengths.
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