氧浓度20ppm、工作温度600℃的气氛炉，适用于无氧环境下的高温热处理。 特点 工作温度360℃和600℃、氧浓度低于20ppm。 应用于电子元件退火、LTCC 去除、玻璃基板退火、陶瓷脱脂等。 高气密性的压力箱构造，氧浓度到达时间短，N2 消耗量低。 磁密封保持高气密 ...

NEW YORK (AP) — U.S. stocks slumped Friday as worries flared again on Wall Street about tariffs and inflation. The S&P 500 fell 0.9% and erased what had been a modest gain for the week. It’s ...