• pbt2021-12-29
• pbt(polybutylene terephthalate) bm433(high-class) instrinsic viscosity(dl/g): 1.380±0.0302021-12-29
• pbt(polybutylene terephthalate) bm433(qualifued) instrinsic viscosity(dl/g):1.380±0.0402021-12-29
• pbt2021-12-29