JUS B M2 391-1984 Support of mine openings Rigid steel egg-shaped arch《矿山支护 蛋形刚性金属支架》.pdf

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MT 646-1997 摩擦式金属支架.pdf

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STAS 413-1968 《超过1千伏的航空电线 起保护作用导线的金属支架大小》.pdf

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MSZ 13013 1 lap-1967 《建筑用金属支架工业要求》.pdf

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