通孔

tōngkǒng

通孔 — tōngkǒng

1. a through hole; a hole that goes completely through an object (e.g., drilled hole, via on a printed circuit board)

   这个零件上需要钻一个通孔，用来穿过螺栓。 zhège língjiàn shàng xūyào zuān yígè tōngkǒng yònglái chuānguò luóshuān — A through hole needs to be drilled in this part to pass a bolt through.