• pbt2021-12-29
• pbt2021-12-29
• pbt(polybutylene terephthalate) xw321(qualified) instrinsic viscosity(dl/g): 0.980±0.0202021-12-29
• pbt(polybutylene terephthalate)xw321(high-class) instrinsic viscosity(dl/g): 0.980±0.0152021-12-29