The characteristics of polyurethane foam used as insulating layer of prefabricated directly buried insulating pipe are introduced.
介绍了作为预制直埋保温管保温层的聚氨酯泡沫塑料的特性。
The characteristics of polyurethane foam used as insulating layer of prefabricated directly buried insulating pipe are introduced.
介绍了作为预制直埋保温管保温层的聚氨酯泡沫塑料的特性。
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