The interior of the glass container is provided with a stir bar. The glass container is provided with a sealingplug.
在玻璃容器的内部置放磁性搅拌子，玻璃容器设有密封塞。
2
I. D. sealing test plug for high pressure hydrostatic testing of pipe, pipelines and pressure vessels.
密封的测试插头用在高水压测试管，管路和压力容器上。
3
Introducing the properties of goggle type board Plug valve, analyzing the characteristics of the valve, proposing the methods of improving sealing structure.