The principle and methods of transmission line non-setting protection are discussed sufficiently.
探讨电力系统线路无定值保护的实现原理和方法。
High shrinkage PET staple fiber is mainly made by the adoption of low temperature drawing, suitable reduction of draw ratio and non-setting process.
涤纶高收缩短纤维的制取,主要采用低温拉伸、适当降低拉伸倍率以及不定型工艺。
High shrinkage polyester staple was prepared by using amorphous polyester chip. The technology of drying, spinning, drawing and non-setting was studied.
采用非结晶聚酯切片制备高收缩涤纶短纤维,对切片干燥、纺丝、拉伸、定型等工艺进行了研究。
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