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1. 用来转换聚合纤维(如：聚丙烯、螺萦或聚碳硅烷)之设备，包括在加热期间拉紧纤维之特殊设备；
1. equipment for converting polymeric fibres (such as polyacrylonitrile, rayon, or polycarbosilane) including special provision to strain the fibre during heating;
具体来说，已知新冠病毒在塑料（聚丙烯）和 304 不锈钢上最长可存活三天，在纸板上可存活一天，在铜上最多可存活四小时。
specifically, the virus was found to be detectable for up to three days on plastic (polypropylene) and 304 stainless steel, for one day on cardboard, and for up to four hours on copper.
