A
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A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
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AGA — American Gas Association
AISI — American Iron & Steel Institute
ANSI — American National Standards Institute
API -— American Petroleum Institute
ASME — American Society of Mechanical Engineers
ASTM — American Society for Testing & Materials
