処女の最初のセックス

処女の最初のセックス

処女の最初のセックス It has been described as W6 and W4 centering gauge, but what do you thing?
処女の最初のセックス Gauge head is turned φ10 in standard, and has been processed in two stages of φ4 and φ10 case of W4.
Concentricity of the shank has become 2 / 1000mm within both.
I can measure the narrow groove.

処女の最初のセックス

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[Centering gauge]