Assertion: tube | /r/AtLocation | vertical position
Facets:
value: for 1 hour at room temperature
type: TEMPORAL
value: strictly
type: MANNER
Source sentences:
text: The tube is placed in a rack in a strictly vertical position for 1 hour at room temperature, at which time the distance from the lowest point of the surface meniscus to the upper limit of the red cell sediment is measured.