The extrusion molding process and main equipment for producing PE large diameter pipe with negative pressure sizing technology are studied.
对采用负压定径技术生产大管径聚乙烯管的挤出成型工艺及其主要设备进行了研究。
The installation is equipped with means (7) for determining the pressure at the output of the main pipe (2), said installation being connected to a control box (8).
所述设备装有用于确定所述主管路（2）出口处充 盈的压力的部件（7），所述设备连接至一控制盒（8）。
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