foamy

The foamy substances cover foam protein, polypeptide, isohumulone, melanoid, metal ions, amylase, alcohol and barm etc.

使啤酒形成沫物质有沫蛋白和、草酮、类黑素、金属离子、糖、酒精、二氧化碳及酵母等。

The outer door is a polyurethane foamy one with a glazing unit observation window, for better perspectivity and heat preservation.

外门为聚氨脂发门，中空玻璃观察窗，透视性好，保温性能好。