加拿大有丰富的天然气资源，用于合成氨、尿素、甲醇和乙烯的生产。
Canada is rich in natural resources, for ammonia, urea, methanol and ethylene production.
适用于聚酯、乙烯、炼重油、尿素化肥等装置中，介质需保温的场合，起安全泄压作用。
Serviced for equipment of Polyester, Ethylene, refining asphalt oil and Urea which need heat preservation and safety in fressure relief.
采用磷酸和聚乙烯醇（PVA）在尿素存在下发生单酯化反应，合成了一种新型聚阴离子电解质磷酸单酯PVA（PMPVA）。
A novel polyanion electrolyte Phosphate monoester PVA(PMPVA) was synthesized by phosphate monoesterified PVA with phosphoric acid in the presence of urea.
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