Methods, devices and systems for a valve-contacting assembly
- 专利权人:
- Joseph M. Waldron
- 发明人:
- Joseph M. Waldron
- 申请号：
- US15843600
- 公开号：
- US10738902B2
- 申请日:
- 2017.12.15
- 申请国别(地区):
- US
- 年份:
- 2020
- 代理人:
- 摘要：
- Disclosed are methods, systems and devices for evacuation of fluid, for example, air or gas, from a container or enclosed area.
- 来源网站：
- 中国工程科技知识中心
