Experiment was discovered: the impurity of the alloy billet produced by direct resistance sintering was lower, than by activated sintering and medium-frequency induction sintering.
试验发现：垂熔烧结可获得较低杂质含量的合金坯料，活化烧结和中频感应烧结获得的坯料杂质含量较高。
Experiment was discovered: the impurity of the alloy billet produced by direct resistance sintering was lower, than by activated sintering and medium-frequency induction sintering.
试验发现：垂熔烧结可获得较低杂质含量的合金坯料，活化烧结和中频感应烧结获得的坯料杂质含量较高。
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