扩孔

Traditional form:

擴孔

Pinyin (reading):

kuòkǒng

Definitions:

• to widen a tube
• to ream (i.e. widen a hole)

Characters:

• 扩 - to expand, to stretch, to magnify
• 孔 - opening, hole, orifice; great

Traditional characters:

• 擴 - to expand, to stretch, to magnify
• 孔 - opening, hole, orifice; great