他们强调，即使在昆虫移除之后，涂层仍然是完整的(外面硬，里面软)。
They note that the coating remained intact (hard on the outside, soft on the inside) even if the insects moved.
通过调节聚氨酯合成配方组成及其比例，制备了具有结晶性软段的聚氨酯涂层剂。
A polyurethane coating agent with crystalline soft segment was synthesized through the adjustment of polyurethane composition and proportionality.
具有软pu涂层的黑色皮革鞋面。
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