Within the processing range, you can process different spiralduct via apply the corresponding mould.
切换不同规格的管模，可以加工成相对应的风管。
2
Spida has a commitment to the promotion of the use of Spiralduct, and improvement of that duct and related products.
该组织有义务促进螺旋除尘技术的使用，以及对除尘和相关产品的改进。
3
On the base of both consideration of heat transfer performance and resistance, the optimization and research are carried out on single spiralduct double pipe condenser.