foamy

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

使啤酒形成泡沫物质有泡沫蛋白和多肽、异葎草酮、类黑素、金属离子、多糖、酒精、二氧化母等。

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

外门为聚氨脂发泡门，中空玻璃观察窗，透视性好，保温性能好。