前言 我厂从六十年代初开始生产硬质聚氯乙烯制品,影响较大的有塑料粪勺和全塑喷雾器,七十年代初生产在化工部门广为应用的流液管道和管件,如三通、阀门、管材等,并且加工相当数量的耐腐蚀流槽和储存池。八○年前后试制成功电线管及其配套组件,八二年初又最新研制成功 Preface Our factory from the early 1960s began to produce hard PVC products, a larger plastic scoop ladle and all plastic sprayer, the early seventies production lines widely used in the chemical industry pipe and fittings, such as three Pass, valve, pipe, etc., and processing a considerable number of corrosion-resistant runner and storage pool. 80 years before and after the successful trial of electric conduit and its ancillary components, the latest development in early 1982