介绍塑料波纹管极易损坏的成波块成型面的简易修复方法。
The simple repairing method for the forming face of the corrugating block very easy to be damaged for the plastics bellow is introduced.
采用塑料波纹管作为预应力管道是配套真空辅助压浆技术的技术措施。
The prestressed duct was a technical measure of duct grouting by vacuum method.
结合工程应用情况，分析塑料波纹管的优缺点，提出了针对性的解决对策。
They have bad heat-resistant and fire-resistant performance. Authors analyze the characteristic of the plastic bellows for prestressed concrete in the projects and give countermeasure.
文章结合工程实例介绍在实验室及现场同条件下预应力混凝土用PVC塑料波纹管的检测技术及试验方法。
With some engineering examples, this article introduces some testing techniques and methods of PVC plastic corrugated pipe used in prestressed concrete, both in labs and on the spot.
论述了国内外塑料双壁波纹管成型工艺和成型设备的技术要点。
It reviewed the key points of processing technique and equipment for plastic double-walled corrugate pipe at home and abroad.
企业专业生产预应力塑料及金属波纹管。
Prestressed enterprises specializing in the production of plastic and metal bellows.
从 而，在其制造时塑料需要量减少，并且在敷设时可便于该波纹管的操作。
Thus, it needs less plastic in production, and is facilitate to operate the sylphon when lay down.
从 而，在其制造时塑料需要量减少，并且在敷设时可便于该波纹管的操作。
Thus, it needs less plastic in production, and is facilitate to operate the sylphon when lay down.
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