dtyCOCA²¹¹³²⁶ 基本例句 Duty,职务 With the quality problems in processing of polyester DTY filament being considered, it is thoroughly analyzed that the factors such as POY raw filament, engineering, equipment and operation. 针对涤纶 DTY在生产加工过程中所产生的质量问题，分别对 POY原丝、生产工艺、设备、操作等四大影响因素作了全面分析。 chemyq