Environment in summer and winter were simulated. Roles of catalysts on the aeration, hardness and deformation of polyether type PU soft foam were studied.
模拟冬夏季节环境，考察了不同催化剂对聚醚型聚氨酯软质泡沫通气性、硬度和压缩变形的影响。
In summer, nature gives us the fiery red sun and wakes up Brooks, rivers and oceans. Thus, we can cheerfully catch fishes and shrimps and chase after the white foam.
夏天，送给我们火红的太阳，也把溪、河、海洋给唤醒，让我们能捉小虾、小鱼，快乐地追逐着白色的浪花！
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