NBN E 29-301-1988 7500 《工业阀门 钢质或铁质的，高弹体密封的一般用途的蝶形阀》.pdf

相关资源

MNOSZ 2423-1956 《蝶形螺母》.pdf

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TCVN 4223-1986 Fly nuts《蝶形螺母》.pdf

CB T 4303-2013 蝶形止回阀.pdf

CNS 858-1989 Hinges Butterfly Form《蝶形铰链》.pdf

SIS SMS 2313-1970 Disc springs《蝶形弹簧》.pdf

SFS B 5 136-1937 Siipimutterit《蝶形螺母》.pdf

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