日韩人妻丝袜无码中文字幕_亚洲成AV人片不卡无码手机版_欧美一级激情在线_果冻传媒精品传媒视频_黄色a级视频网站免费看免费看_五月六月丁香婷婷淫人网_99精品一区二区_国产女主播最新精品视频_动漫免费在线观看_国产欧美亚洲高清激情

Scope of use:

If electronic products such as mobile phones and watches have requirements for water resistance and air leakage, the casing needs to be tested for air tightness.

advantage:

1. High precision, very sensitive to changes in induced pressure;

2. High stability, with automatic temperature compensation function;

3. The pneumatic connection is simple, which can realize quick loading and unloading;