GOST 24451-1980 Highway tunnels Construction and equipment clearance diagrams《公路隧道 邻近构筑物和设备的外形尺寸》.pdf

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CB 1220-1993 921A、922A钢焊接坡口基本形式及焊缝外形尺寸.pdf

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HB 6130-1987 飞机压力加油接嘴外形尺寸标准.pdf

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