| 释义 |
nounMetalworking. a bar holding a tool for boring a cylinder or the like. Origin of boring barFirst recorded in 1835–45 Words nearby boring barboric acid, boric oxide, boricua, boride, boring, boring bar, boring machine, boring mill, Boris, Boris Godunov, Boris I Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for boring barNext, the boring-bar m1 is brought into position, the drill support being swung back out of the way. Turning and Boring|Franklin D. Jones In the first operation, boring-bar m is brought in line with the spindle and is entered in bushing r in the chuck. Turning and Boring|Franklin D. Jones When a hole is to be bored, a boring-bar B1 is inserted in the spindle and the cutter is attached to this bar. Turning and Boring|Franklin D. Jones The spindle S which drives the boring-bar, and the spindle feeding mechanism, are carried by a saddle. Turning and Boring|Franklin D. Jones
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