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DIN 939 双头螺柱—旋入端长度≈1.25d

(DIN 939 | )

Studs with a length of engagement equal to about 1,25d

DIN 939 双头螺柱—旋入端长度≈1.25dDIN 939 双头螺柱—旋入端长度≈1.25d