One case indicated the influence of the casting quality of the knock-off type specimen on the quality judging veracity of nodular iron castings.

 
  • 實(shí)例之一是說(shuō)明敲落式球鐵試塊的鑄造質(zhì)量對判斷球鐵鑄件質(zhì)量準確度的影響;
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