实验测定了化学成分、浇注温度、铸件模数和铸型刚度对球墨铸铁收缩特性的影响。
The effects of casting modulus, pouring temperature. carbon equivalent and mould toughness on the solidification shrinkage of ductile cast iron was investigated experimentally.
使用多组不同频率和不同脉宽的工作时钟，定量测定分析ADC0 80 9模数转换器的转换速度和转换结果。
The conversion speeds and results of ADC0809 analog-to-digital converter are accurate tested and analyzed by using multi-master clock pulse with different frequency and pulse width.
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