no one has managed to stop outdoor heat exchangers frosting up during winter. 没有人能设法阻止户外的热交换器在冬季结霜。
the third technical proposal has the advantages that the composite curing agent which is added to the heat curing silicone rubber compound can ensure anti-frosting effect, namely, nonblooming effect. 第三个技术方案的优点在于,复合硫化剂加入到热硫化硅橡胶胶料中后,能保障不起霜即不喷霜。