The shell spinning solution and the core spinning solution are respectively injected into a syringe, and the syringe is connected to a coaxial needle whose specification is 17/22G.
Inject the shell spinning solution and the core spinning solution into a syringe respectively, and connect the syringe to a coaxial needle with a needle size of 17/22G.
The shell spinning solution and the core spinning solution were injected into syringes respectively, and the syringes were connected to coaxial needles with the specifications of 17/22G.