HG 20519.26-1992 设备管口方位图.pdf

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SAE AS 5229-2003 PORT INTERNAL STRAIGHT THREAD AIR CONNECTION DESIGN STANDARD《气压连接用内直螺纹管口的设计标准》.pdf

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HG T 2143-2012 搪玻璃设备 管口.pdf

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HG T 2143-1991 搪玻璃设备 管口.pdf

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