alkali hydrometer 中文意思是什麼
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A series of nickel - chromium - copper cast - irons with varied rare earth were designed and theirs microstructures were observed by optical election microscope ， the corrosion rates of re - ni - cr - cu alloy cast irons in static 、 room ? temperature and strong alkali liquor were measured by the hydrometer method
設計了含不同量的稀土鎳-鉻-銅合金鑄鐵，採用光學顯微鏡觀察組織，用失重法測定合金鑄鐵在靜態、室溫、高濃度堿液中的腐蝕速率。
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