粗糙表面的晶粒间易产生V形口，导致应力集中，降低了膜的断裂强度。
Rough surface is easy to generate V shape of stress concentration, which reduce fracture strength.
郁金香遇热易打开，要小心花形会改变。
Tulips will open when heat. So, it is is very depends on your design.
郁金香遇热易打开，要小心花形会改变。
Tulips will open when heat. So, it is is very depends on your design.
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