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A Welding Symbol Has a Circle on the Reference Line

question 63

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A welding symbol has a circle on the reference line with its center at the intersection of the reference line and leader line. Another circle has its center at the middle of the reference line. Next to this circle is the notation "40". A vertical line starts at the center of the first circle and is drawn upwards, and a small filled in equilateral triangle is attached to the top with one side on the vertical line. What does this welding symbol signify?


Definitions:

St. Vitus' Dance

Another name for Sydenham's chorea, a disorder characterized by rapid, uncoordinated jerking movements primarily affecting the face, hands, and feet.

Early Asylums

Institutions used historically to house and sometimes treat individuals with mental disorders, often under inhumane conditions.

Bedlam

Any form of rowdy, chaotic behaviour. The noise and disruption among the residents of Bethlem Royal Hospital (as it is now known) prompted the use of the word (the local corruption of “Bethlem”). This asylum was established by Henry VIII in 1547 when he had the monastery of St. Mary of Bethlehem in London converted.

Physical Disorders

Medical conditions that involve significant bodily symptoms and impairments, distinct from purely psychological disorders.

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