工业试验结果表明，新材质制造的坩蜗使用寿命是普通铸铁坩埚的2 ~3倍。

The industrial test results have shown that the service life of new low alloy cast iron crucible is 2-3 times as long as ordinary grey cast iron crucible.

工业试验结果表明，新材质制造的坩蜗使用寿命是普通铸铁坩埚的2 ~3倍。

The industrial test results have shown that the service life of new low alloy cast iron crucible is 2-3 times as long as ordinary grey cast iron crucible.