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| add： |
chengnan developing |
| tel： |
0575-88322482 88321669 |
| fax： |
0575-88323469 |
| mobile： |
13357597179 |
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13355753802 |
| mail： |
sxtjgu@163.com |
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the advantages of spiral duct |
nine advantages:
1) product support good, high standardization;
2) closed strong;
3) the ventilation loss is small;
4) to facilitate factory testing;
5) anti-balanced external pressure (negative pressure) program;
6) material province;
7) the installation cost is low;
8) install the overall layout of appearance;
9) routine maintenance easy to clean. |
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