When the slit is stretched, a certain mutual transfer is generated between the surface line and the bottom line, so it has better elasticity.The lines of the double suture are called double-line links, in fact, a needlework and hook lines […]
When the slit is stretched, a certain mutual transfer is generated between the surface line and the bottom line, so it has better elasticity.The lines of the double suture are called double-line links, in fact, a needlework and hook lines […]