ureasen.[生化]脲酶；尿素酶urean.尿素urea-based polyurea polyol尿素基聚脲多元醇urea-formaldehyde plastics脲醛塑料,尿素甲醛塑料urea - formaldehyde resins脲醛树脂urea-formaldehyde adhesive脲醛粘合剂urea-formaldehyde colophony脲醛树脂urea-entrapped filter paper尿酶滤纸Urea resin adhesives for wood木材用尿素树脂胶粘剂urea base compound fertilizer尿基复混肥Urea combined with herbicides混用urea plastic molding compound[化] 压制脲醛塑料