... 线印模版，镂印模版 stencil plate 线胀系数 coefficient of inertia expansion 线桩，界址树 line tree ...
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Trial use shows that the nano antibacterial PP-R composite pipe of the invention has the advantages of high strength, small coefficient of inertia expansion and remarkable antibacterial effect.
本发明的纳米抗菌PP-R复合管，经试用显示了强度高、线胀系数小，具有明显的抗菌效果的优点。
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