| http://www.w3.org/ns/prov#value | - As shown FIG. 2 which is described below, the present invention is a method of manufacturing a threaded joint for a pipe having a pin portion having a male thread comprising a tapered thread with a thread cross-sectional shape which is roughly trapezoidal, and a box portion having a female thread which engages with the male thread and which comprises a tapered thread with a thread cross-sectional
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