双壁管：外层采用优质、柔软的交联聚烯烃材料，内层热熔胶复合加工而成。外层材料具有绝缘防腐、耐磨等优点，内层具有低熔点、防水、密封和高粘接性等优点。双壁管广泛应用于电子设备的接线防水、防漏气；电线分支处的防腐保护，电线电缆的修补，水泵和潜水泵的接线防水等场合。
双壁波纹管 hdpe ; UPVC
双壁热缩套管 XR-H Dall HEAT SHRINKABLE TUBES ; BTUM ; BTDW ; JTUM
双壁碳纳米管 double-walled carbon nanotubes ; DWNT ; DWCNT ; Double walled nanotubes
HDPE双壁波纹管 HDPE double-wall the corrugated pipe ; HDPE double wall corrugated pipe
聚乙烯双壁波纹管 PE HDPE ; PE Double wall corrugated pipe
双重壁碳纳米管 DWNT
PVC双壁波纹管 double partition PVC wave veins plastic pipe
HDPE双壁缠绕管 HDPE double-deck twisted pipe
C-PVC双壁波纹管 C-PVC double-wall corrugated pipe
型的双壁碳纳米管 Double-Walled Carbon Nanotube ; DWCNT
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.
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