JB ZQ 4179-2006 Hexagonal socket head plug with 55 degree non-sealed pipe thread《55 非密封管螺纹内六角螺塞》.pdf

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JB ZQ 4446-2006 Hexagonal socket head plugs with 55 degree sealed pipe thread (PN10)《55 密封管螺纹内六角螺塞(PN10)》.pdf

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JB ZQ 4447-2006 Hexagonal socket head plugs with 60 degree sealed pipe thread (PN16)《60 密封管螺纹内六角螺塞(PN16)》.pdf

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