Using a scooter can improve cardiopulmonary function, strengthen leg muscles and enhance arm strength, effectively stretch leg ligaments, promote bone development, avoid backaches, promote balance and response capabilities, enhance sensitivity and coordin
Which is also called DTY is the final products after stretching continuously and twisting deformation process in the texturing machine. It usually use POY as raw material (spinning process is similar to FDY, but the elongation is more high). After twistin