theads

基本解释

• 线程

同根派生

英汉例句

• 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.
  以己二酸为原料,经酯化反应和酰胺化反应(以氢氧化钾为催化剂),制备了四羟乙基己二酰胺,探讨了催化剂、反应温度和反应时间对产品收率和羟值的影响。
• thead gauge
  螺纹规
• thead pitch gauge
  螺距规