Reference number
香港六合彩开奖 5167:1980
香港六合彩开奖 5167:1980
Measurement of fluid flow by means of orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits running full
Edition 1
1980-02
Withdrawn
香港六合彩开奖 5167:1980
11168
Withdrawn (Edition 1, 1980)

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