| 摘要 |
One type of metal pipe with plastic foaming consists of metal pipe, plast ic foaming layer and plastic protection layer from inside to outside. It is produced by extruder. The extruder extrudes the foaming layer and the protection which a re pressed onto the metal pipe by compound mould, the product is completed immediately. The invention has the advantages in: good insulation, moisture- proof, flame-proof, stable quality, and long life of usage. With use of this pipe, the installation time of insulation pipe will be shortened, and the force of labors will be reduced.
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