keepv.保持；保留；继续；贮藏；经营；遵守；供给；照管；饲养；耽搁；保持食物不变质；健康状况如何；保守（秘密@）；记录；遵守；保护n.生计；保存；城堡主楼；监狱；围墙keep warm保温，保暖

1. The optimized holding pressure is in the middle of the maximum and minimum normally.
   优化的保压压力一般为最低保压压力和最高保压压力的中间值。
2. A holding pressure unit allows the pre-plasticizer or a reciprocating screw to plasticize during the long holding time.
   保压装置使预熔器或往复螺杆在冗长的保压时间内加料。