theads

常见例句

• 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.
  以己二酸爲原料,經酯化反應和醯胺化反應(以氫氧化鉀爲催化劑),制備了四羥乙基己二醯胺,探討了催化劑、反應溫度和反應時間對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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