China's polyvinyl chloride (PVC) is developing at an alarming rate. New construction and expansion projects have been launched, and production capacit...
The production and processing methods of PVC bags are usually high-frequency hot pressing or sewing. The high-frequency hot-pressed PVC bag, that is,...
Since ancient times, the masses of herdsmen have lived “water and grass”, and tents are common houses for herders. Because the tent is in ...