鉛的提純 的英文怎麼說

中文拼音 [qiāndechún]
鉛的提純 英文
improving of lead
  • : 鉛名詞1. (金屬元素) lead (pb) 2. (鉛筆心) lead (in a pencil); black lead
  • : 4次方是 The fourth power of 2 is direction
  • : 提動詞(垂手拿著) carry (in one's hand with the arm down)
  • : 形容詞1 (純凈; 不含雜質) pure; unmixed 2 (純粹; 單純) simple; pure and simple 3 (純熟) skil...
  1. Abstract : in this paper, a kind of technological scheme for one - step precision forging spur gear with large module is put forward by using positive friction role. experiment, in which commercial pure lead is taken as test material, is done in the special die designed, and force vs. stroke curve is recorded. it is shown that positive friction role can efficiently make a contribution to the filling of the tooth cavity, but increase forming force

    文摘:針對大模數直齒圓柱齒輪,出了利用積極摩擦一步成形工藝方案,並用工業作為試驗材料,在設計專用模具上進行試驗,記錄了力? ?行程曲線,結果表明:利用積極摩擦作用能夠有效地保證直齒圓柱齒輪精鍛時齒腔充滿,但同時增加了變形力。
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