The phrase "at rigid" is not correct and does not make sense in written English.
It seems to be an incomplete or incorrect expression, and without additional context, it cannot be used appropriately.
Example: "The structure remained at rigid angles throughout the construction process."
Alternatives: "in a rigid state" or "at a fixed position".
There, a platoon of look-alike mannequins stand at rigid attention, their waxy, alabaster profiles all resolutely pointing south.
The reception room was guarded by ceremonial soldiers standing at rigid attention in traditional turbans topped with fans of starched black cotton.
But first they all stood at rigid attention as a loudspeaker played "The Marines Hymnn" and then the haunting notes of taps.
Always at rigid attention, hair freshly cropped, chin withdrawn and trembling, barked at by unseen voices, we stood or ran like insects from one place to another".
And there was Debra Carpluk standing by her husband's open coffin, which was flanked by two firefighters in dress uniform and standing at rigid attention.
They marched slowly through Sudipen's cobbled streets ahead of a white Mercedes hearse, then stood at rigid attention in the withering humidity as hundreds of people gathered in an open-air hall.
A die shape DSA is also carried out by defining a design velocity field at rigid-body geometry.
Figure 10 shows the fracture surfaces of the adhesive Supreme 10HT at the rigid adherend (Ra) side and at the flexible adherend (Fa) side of the joint.
The feature is first located at 6.5 h LT and rotates at 56% rigid corotation, i.e., somewhat faster than the overall rotation rate of the wider form, although it fades throughout the first orbit.
The predicted electrical properties by the proposed PVT model are compared with those given by the conventional PV model at its operating cell conditions and also at several rigid atmospheric conditions.
In order to enforce the prescribed velocity at the rigid boundaries, singular forces are applied on the fluid at these boundaries.
