As explained in Chapter 1, the urethane group is the product of the reaction of a hydroxy compound with an isocyanate group (reaction 4.8).
正如第1章解释，聚氨酯组是羟基化合物与异氰酸酯组的反应(反应4.8)的产品。
As explained in Chapter 1, the urethane group is the product of the reaction of a hydroxy compound with an isocyanate group (reaction 4.8).
正如第1章解释，聚氨酯组是羟基化合物与异氰酸酯组的反应(反应4.8)的产品。
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