未贯穿的贯穿螺孔，盲螺孔的英文

blind tapped hole

• 未:    did not; have not
• 贯穿:    run through breakt ...
• 的:    4次方是 The fourth po ...
• 螺孔:    screw; screw hole
• 盲:    blind
• 螺:    spiral shell; snai ...
• 孔:    hole; opening; ape ...