STAS 10421-1976 Self-locking grub serews SLOTTED GRUB SCREW WITH HALF DOG POINT WITH TRUNCATED CONE END Dimensions《自动上锁 蛴螬带有切去顶端的圆锥末端的有半狗点的开有沟槽的蛴螬 尺寸 》.pdf

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