NF L22-151-1975 Slotted and drilled cheese head screws Sim thread (rech ) 《开槽有孔圆头螺钉 Sim螺纹(rech）》.pdf

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NF L22-296-1979 Slotted and drilled cheese head screws fully threaded ISO thread 《全螺纹开槽和有孔圆头螺钉 ISO螺纹》.pdf

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