extractor spring造句

例句与造句

1. An O-ring surrounds the extractor spring.
2. The standard four-coil extractor spring is replaced with a commercial off-the-shelf ( COTS ) five-coil spring.
3. Though a significant improvement over the extractor of the Model 1865 Springfield Rifle, the Model 1866 extractor was still excessively complicated and the extractor spring somewhat prone to breakage.
4. It's difficult to find extractor spring in a sentence. 用extractor spring造句挺难的