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urea formaldehyde
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urea formaldehyde
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工学
尿素
释
urea formaldehyde
脲甲醛
由尿素和甲醛在一定条件下反应缩合的产物。白色无味粉末或颗粒状,难溶于水,不挥发,不吸湿,施入土壤后,在水解与微生物侵袭的双重作用下缓慢地释放其养分。它不是单一化合物,而是由链长与分子量所不同的甲基尿素缩合而成,其中包含从一甲基二脲至五甲基六脲等系列聚合物,其全氮(N)含量大约38%。
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low carbon agriculture
low carbon breeding
low-carbon building
low carbon city
low-carbon city planning
low carbon development
low carbon economy
low-carbon economy
low carbon emission assessment of water supply and drainage engineering
low carbon green ecological building
low carbon manufacturing
low-carbon mixed alcohols synthesis via syngas
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low-carbon scheduling
low carbon steel
low-carbon steel
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Low Church
Low Class Life
low codimension problem
low-coefficient glass
low contrast
low cost automation
low cost automation, LCA
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