What does the symbol of elbow mean?

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Schxx is the wall thickness grade, and 90e(s) represents an elbow with a short radius of 90 degrees; 90e(l) denotes an elbow with a long radius of 90 degrees; 45e(l) denotes an elbow with a long radius of 45 degrees; 45e(s) represents an elbow with a short radius of 45 degrees; 180e(s) indicates an elbow with a short radius of 180 degrees; 180e(l) represents an elbow with a long radius of 180 degrees; R(c) stands for concentric reducer; R(e) stands for eccentric reducer; T(s) stands for equal-diameter tee; T(r) stands for reducing tee; Cr(s) stands for equal diameter cross; Cr(r) represents a variable cross; C stands for pipe cap; See gb/t 12459-2005 Seamless Butt Welded Steel Pipe Fittings for details.

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