Epoxy or plastic liming may be cast into the concrete pipe during manufacture;or bitumastic or coal tar epoxy may be painted on the concrete pipe surfaces after installation.
可以在制造混凝土管道时将环氧和塑胶衬
浇筑在面，或在安装后用沥青砂浆或煤焦油屠宰混凝土管的表面。
Epoxy or plastic liming may be cast into the concrete pipe during manufacture;or bitumastic or coal tar epoxy may be painted on the concrete pipe surfaces after installation.
可以在制造混凝土管道时将环氧和塑胶衬浇筑在面，或在安装后用沥青砂浆或煤焦油屠宰混凝土管的表面。
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类均由互联网资源自动生成，部
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