tapping
n. 开孔；导出液体；流出口；浇铸；抽头
sp. 动词tap的现在分词.
近义词：patter，drumming，beating，rhythm，pitter-patter，drumbeat，
英英释义
Noun
- the sound of light blow or knock;
"he heard the tapping of the man's cane"
例句
用作名词(n.)
- The amount of lubricity is controlled for the particular machining operation and tool, such as tapping or face milling.润滑剂的量是跟道具特定的机加工工艺和刀具而特设，例如开孔或面铣。