CNS 4848-1982 Hexagon Socket Pipe Plugs with Taper Thread《六角承窝管塞（具推拔螺纹）》.pdf

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CNS 4847-1982 Hexagon Socket Pipe Plugs with Shoulder and Parallel Thread《六角承窝管塞（具肩部与平行螺纹）》.pdf

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