现代的航空引擎的工作温度在2000摄氏度左右，Stipp博士说，悬浮的火山灰中玻璃状颗粒在800摄氏度时就开始软化。
Modern aircraft engines operate at temperatures of around 2, 000C. Dr Stipp says the glassy particles in the ash cloud start to soften at about 800C.
从某电厂700 MW机组锅炉取混煤灰样，在智能灰熔点测定仪上采用角锥法对其进行软化温度测定。
Samples of blended coal ash were taken from the boiler of a power plant 700mw unit. Their softening temperature was measured by a pyramid method on an intelligent ash-melting point measuring device.
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