The volume is about 3×5~6 inches square! The pound is an Anglo-American system of weights and measures. There are three kinds of pounds: constant scale, gold scale and medicine scale.

Constant weight (general object weight) 1 lb is equal to 0.45392 kg.

Jin Heng (weight of gold and silver) 1 pound is equal to 0.37324 kg.

Drug balance (drug weight) 1 lb is equal to 0.37324 kg.

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