Many properties of polyester filaments such as heat shrinkage, tenacity, elongation at break and etc. are greatly influenced by drawing, so post-drawing is impo
The content of dimethylallylamine was determined using glacial acetic acid as solvent, acetic-formic mixture as an anhydrite, perchloric acid-glacial acetic aci
As for the theory and method in garment structural design according to human figures,a principle for garment design,i.e.body-fitting without added allowance,and