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基本解釋

• 線程

同根派生

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英漢例句

• Using adipate as a starting material,a new curing agent,tetrahydroxyethyladipicdiamide(THEAD) was prepared by esterification and acylamide reaction with potassium hydroxide as a catalyst.
  以己二酸爲(wèi)原料,經(jīng)酯化反應(yīng)和醯胺化反應(yīng)(以氫氧化鉀爲(wèi)催化劑),制備了四羥乙基己二醯胺,探討了催化劑、反應(yīng)溫度和反應(yīng)時(shí)間對(duì)産品收率和羥值的影響。
• thead gauge
  螺紋槼
• thead pitch gauge
  螺距槼

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