共 50 条
- [1] NEW PROCESS CUTS NOX EMISSIONS 50-PERCENT IN TEST [J]. POWER ENGINEERING, 1991, 95 (10) : 40 - 40
- [4] U.S. paper industry closes in on 50 percent recovery goal [J]. Recycled Paper News, 2001, 11 (06):
- [5] TIMKENS NEW FAIRCREST FACILITY BETTER THAN 50-PERCENT COMPLETE [J]. IRON AND STEEL ENGINEER, 1984, 61 (10): : 65 - 66
- [6] NEW DRIVE TRAIN PROMISES UP TO 50-PERCENT MPG GAIN [J]. AUTOMOTIVE INDUSTRIES, 1979, 159 (06): : 66 - 67
- [8] THE ELUSIVE GENERALIST PHYSICIAN - CAN WE REACH A 50-PERCENT GOAL [J]. JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 1993, 270 (09): : 1069 - 1073
- [10] IAEA REPORTS 50-PERCENT INCREASE IN NEW NUCLEAR-PLANTS [J]. NATURE, 1979, 281 (5733) : 625 - 625