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1·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。