n. 钻孔器, 铰刀, 果汁压榨器

[化] 铰刀; 铰床

[医] 扩孔钻(牙)

Reamer \Ream"er\ (-[~e]r), n.
One who, or that which, reams; specifically, an instrument
with cutting or scraping edges, used, with a twisting motion,
for enlarging a round hole, as the bore of a cannon, etc.