成人做爰免费视频免费看_成人a级高清视频在线观看,成人a大片在线观看,成人a大片高清在线观看,成人av在线播放,一a一级片,一级黄 中国色 片,一级黄 色蝶 片,一级黄色 片生活片

CBV型彈道壓力罐測定儀

Closed pressure vessels are used to determine the ballistic properties of explosive materials.
They are designed up to maximum working pressure of 500 MPa (5000 bar) and are available with a chamber volume of 25 to 700 ccm. 
Each vessel is tested at a static pressure of 600 MPa.  The L/D ratio of the combustion chamber is constant for all types of pressure vessel at 2:1.
The improved pressure vessels are designed to meet the needs of practicable work.
Components subject to wear and tear can be quickly and easily replaced and they are cheap