Fiber has the difference between twist and twist
The roving is divided into direct roving (also called direct yarn) and plied rovingDirect roving is defined as: parallel filaments and twisting and formed cluster body, no direct roving raw silk production process is relatively simple, products made of high strength glass steel products, can be directly applied to the winding and pultrusion process, can be directly used for cloth (i.e. roving fabric, commonly known as Plaid), therefore is widely used.
Twist is the number of twists in the unit length of the yarn along the axis, generally expressed as a twist of /m
Twist refers to the twist of a single yarn in a single yarn or strand. The inclination of the single yarn from the lower right corner to the upper left is called "S twist". The twist from the lower left corner to the upper right is called the Z twist
