ball safety valve

例句：

1. 1.The ball safety valve prevents the pressurefrom building up in the system.
   球安全阀防止系统中的压力积累。
2. 2. The engineers were tasked withreplacing the old ball safety valvewith a new one.
   工程师被指派用新的球安全阀替换旧的。
3. 3.The ball safety valve is used to controlthe flow of gases and liquidsthrough pipelines.
   球安全阀用于控制气体和液体通过管道的流量。