The urea-formaldehyde resin was made from industrial 36% formalin and 46% N carbamide in the laboratory. The urea-formaldehyde resin was used to imbed the insect specimens.
本文探讨了在实验室条件下利用工业用36 ％ 甲醛和含氮46％ 农用尿素合成脲醛树脂包埋昆虫标本的方法。
This paper reported the results of laboratory study and industrial development of the new type non chrome ferrite W-201 catalyst for n-butene oxidative dehydrogenation to butadiene.
本文报导了丁烯氧化脱氢制丁二烯新型无铬铁系w - 201催化剂的实验室研究和工业生产结果。
应用推荐