pressure preservation

• 保压

pressure preservation的用法和样例：

例句

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。