compressed air method造句

例句与造句

1. He had patented a compressed air method for reducing cave-ins, but in 1880, 20 workers were killed in a blowout.
2. There is, however, spark testing which has a section that explains about metal burning ( see spark testing # Compressed air method ) . "'Sp in ni ng Spark "'01 : 37, 27 December 2009 ( UTC)
3. It's difficult to find compressed air method in a sentence. 用compressed air method造句挺难的