例句與造句

1. Test method for the viscosity of the dilute solution of polyformaldehyde resin
   聚甲醛樹脂稀溶液粘度試驗方法
2. The chloromethylation of acetanilide and its derivatives in a polyformaldehyde - hc1 system gave n - substituted products as the major product
   摘要?察了乙酰苯胺及其衍生物在多聚甲醛鹽酸體系下的氯甲基化反應(yīng)，結(jié)果表明， n -氯甲基化反應(yīng)的產(chǎn)物是主要產(chǎn)物。
3. Formaldehyde can be used as solvent , conservative , and reducing agent . it is also the important material for synthetic resin , coating , agricultural pesticide , phenolic plastic , vinylon , polyformaldehyde plastic , and polyoxymethylene fiber
   甲醛，俗稱“福爾馬林” ，可作溶劑防腐劑還原劑，是合成樹脂涂料農(nóng)藥酚醛塑料維尼綸及聚甲醛塑料聚甲醛纖維等的重要原料。
4. It's difficult to find polyformaldehyde in a sentence. 用polyformaldehyde造句挺難的