Spida has a commitment to the promotion of the use of Spiral duct, 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。
SPIDA is an association made up of member companies which make Spiral Duct and its related products and associated members supplying materials used in the manufacturing of Spiral Duct.
螺旋除尘厂商联合会由生产螺旋除尘以及相关产品的公司以及提供加工材料的企业组成。
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