代理pbt美国杜邦sk603加玻纤20增强电子电器部件家电部件
分钟沙漏计时器|价格|批发-全球塑胶网-第1页
roof skylight weather-proof surface 250um iso-phthalic polyester
供应pa612/美国杜邦/159
mainly made of epoxy resin, polyester resin add
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