The second type of flow control statement in Python is the while loop, which executes a block of program statements while an expression evaluates True.
Python中的第二种流控制语句是while循环，它在一个表达式计算为True时执行一个程序语句块。
It can display instantaneous and cumulative flow division simultaneously, and regulate flow by controlling parameter in order to achieve close-loop control of pressure in high-pressure pipe network.
并且可以实时显示瞬时和累计的分流流量，并可自由地对控制参数进行调节，以实现高压管网压力的闭环控制。
The press takes use of advanced two-way cartridge valve system and imported electric pump technology which can realize double closed loop control of pressure and flow rate.
液压系统采用了先进的二通插装阀系统、进口高性能的电子泵技术，实现了主缸压力与流量的双闭环控制；
应用推荐