fluid pressure

Therefore, some Democrats are under pressure to take policy actions their union allies oppose.

He held it, but it was without pressure; without recognizance of the delight with which he once grasped it.

It separates into three layers upon standing—a brown deposit, a clear fluid, and a frothy layer.

Under the internal pressure his whiskers stood on end and his face grew red.

With him one is at high pressure all the time, and I have gained a good many more ideas from him than I can work up in a hurry.

Mr. Brown seizes the proffered member, and gives it as hearty a pressure as the publicity of the occasion will permit.