ureasen.[生化]脲酶；尿素酶urean.尿素urea -based compound fertilizer尿基复合肥urease/nitrifieation inhibitor脲酶/硝化抑制剂urea - based compound fertilizer尿基复合肥urea-formaldehyde resin adhesive尿醛树脂胶urea-formaldehyde molding powder[化] 脲醛压塑粉urea-formaldehyde moulding powder脲醛压塑粉Urea- formaldehyde resin adhesive脲醛树脂胶黏剂urea adduetion fraetionation method尿素包合法urea non-adduct-forming material尿素不加合物urea-thiourea-formaldehyde resin脲-硫脲-甲醛树脂