By adopting some technology of advanced detection, adding temporary invert, sleeve valve pipe and lock foot bolts, the construction of the tunnel is completed safely and successfully.

暗挖区间隧道通过采用超前探测、增设临时仰拱、袖阀管、锁脚锚管等技术措施，安全、顺利完成了北四环路和北辰桥段的施工。

youdao

The hydraulic valve auxiliary control unit (12) keeps the exhaust valve (5) in a temporary opening position.

液压气门辅助控制单元（12）将排气气门（5）保持在暂时打开的 位置上。

youdao

Is pulmonary valve stenosis temporary or long lasting?

CNN: Pulmonary valve stenosis