The structure, operating principle and safe protection ol chips conveying system for spinning production line were analysed in this paper.

本文分析了供送纺丝生产线的切片输送系统的结构、工作原理、安全保护等。

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The relative characteristics of the pseudo code are analyzed. With discussion on the principle ol ultrasonic level measurement based on pseudo code technology, the level measuring system is designed.

分析了伪随机码的相关特性，讨论了基于伪码相关技术的超声波液位测量原理，设计并完成了液位测量系统。

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High activity polyol is required for system cured by ol-chain-extender, but this system is easily influenced by ambient moisture and its physical properties are poor.

醇固化体系必须用高活性聚醚，但是固化体系受环境水分的影响比较大，产物性能比较差。

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