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urea formaldehyde
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urea formaldehyde
Encyclopedia
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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electrostatic deflector
electrostatic discharge immunity test of launch vehicle shell
electro static discharge test
electrostatic dissipation
electrostatic electrification series
electrostatic energy
electrostatic equilibrium
electrostatic-fabric integrated precipitator
electrostatic fiber separation
electrostatic field
electrostatic field of high tension
electrostatic focusing
electrostatic force
electrostatic force microscopy
electrostatic force microscopy, EFM
electrostatic fundamental experiments
electrostatic generator
electrostatic gravity gradiometer
electrostatic Green function
electrostatic grounding
electrostatic gyroscope
electrostatic half-life
electrostatic hazard
electrostatic induction
electrostatic influence
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