A quality of the yellow tungsten oxide produced by Soviet hydrometallurgical plants was often lower than abroad.

 
  • 但蘇聯(lián)工廠(chǎng)采用濕法冶金生產(chǎn)的黃色氧化鎢產(chǎn)品,其質(zhì)量仍然高于國外同類(lèi)產(chǎn)品。
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