定位槽 meaning in English

constant head tank
locating slot
retaining nest

Destructive tests on welds in metallic materials - impact tests - test specimen location , notch orientation and examination
金属材料焊接的破坏试验.冲击试验.试样定位槽口取向和检验
The locating pin in the relief valve cover should be aligned with the corresponding locating notch in the top of the relief valve body
安全阀阀盖内的定位销钉应该对齐在安全阀阀体顶部相关的定位槽上。