Booms (ships). Fittings for tubular steel cargo booms, heel fittings and caps for 5, 10, 15, 20 and 30 ton booms, compiled and promulgated by American Marine Standards Committee; approved May 23, 1928, and Feb. 8, 1929, as American marine standards H no 30-1928 and H no. 31-1929.

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