检验孔 meaning in English
insolation hole
inspection hole
Examples
- Specification for inspection , access and entry openings for pressure vessels
压力容器检验孔观察孔和入口孔规范 - Transportation equipment . road tankers for liquified pressure gas . holes for gauging , degassing and testing
运输设备.承压液化气罐车.测量孔除气孔和检验孔