underhole
下部掏槽, 底槽
发音
US
词形变化
underholed
underholes
三单
underholes
underholing
underholing
现在分词
underholed
过去式
underholed
过去分词
释义与例句
v.
-
1.
To cut away or mine out the lower portion of a coal seam or a part of the underlay so as to win or get the overlying coal.
商务 采矿
词源
From under- + hole.
来源：wiktionary