介绍了生产聚氯乙烯（ PVC）双壁波纹管的工艺流程、生产设备、工艺控制要点及配方设计，分析了生产中出现故障的原因，并提出解决措施。
The processing, production equipment, main technical points and dosage design of double wall corrugated PVC pipe are introduced, and the results of faults and its solutions in production are analyzed.
该生产线用于生产PVC、PE原料的单壁波纹管，主要由双（单）螺杆挤出机、成型机、收卷机等主设备组成。
The line produces single-wall corrugated pipe made for PVC or PE material. It is made up twin(single)-screw extrude, forming machine, reeling machine and so on.
用含有铁族金属硫化物的复合石墨棒作阳极，在氢气氛围下实施电弧放电，制备出了双壁纳米碳管。
Using the composite graphite rods with the sulphide of iron group metals as anode, the double-wall carbon nanotubes have been fabricated by arc discharging under hydrogen atmosphere.
并介绍了与单半径孔型和双半径孔型比较，W成型的优点及在厚壁管生产中的应用实例。
Then, they introduced the advantages of W-bend forming and its application in thick-walled tube production.
针对PV C - U双壁波纹管生产线的各个工序特点，采用不同的控制模式，形成了一套PV C - U双壁波纹管生产质量控制系统。
Aiming at each process characteristics of the production, it has adopted different controlling models and formed a set of the production quality control system of PVC-U double-wall corrugated pipe.
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.
分析了影响PV C - U双壁波纹管生产中出现焦料问题的几种因素，并介绍了一些生产经验。
Analysis was made of several factors leading to occurrence of decomposition in production of PVC-U double-wall corrugated pipe and some manufacture experience was introduced.
并提出了基于计算机技术的PV C - U双壁波纹管生产质量控制系统的构建原理和设计思路。
This thesis points out the structure principal and project ideas of the production quality control system of PVC-U double-wall corrugated pipe, which is based on computer technology.
采用紧束缚能带理论，利用所提出的考虑卷曲效应的紧束缚能量哈密顿量，建立了公度双壁碳纳米管（DWNT）的能带结构模型；
The band structure model of commensurate double-walled carbon nanotube (DWNT) was built by using tight-binding Hamiltonian with curvature effect included.
热缩系列产品，是为市政工程排水、给水用双壁波纹管端口连接密封而设计的。
FRYS series heat-shrinkable sleeve products are designed for connection and sealing of ports of double-wall corrugated pipe for water discharge and supply of municipal engineering.
热缩系列产品，是为市政工程排水、给水用双壁波纹管端口连接密封而设计的。
FRYS series heat-shrinkable sleeve products are designed for connection and sealing of ports of double-wall corrugated pipe for water discharge and supply of municipal engineering.
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