Is: 1703 - 1977 (With Amendment No.1 - 1978); Specification For Ball Valves (Horizontal Plunger Type
Indian Standards Institution
Is: 1703 - 1977 (With Amendment No.1 - 1978); Specification For Ball Valves (Horizontal Plunger Type - BIS 1977
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Is: 1703 - 1977 (With Amendment No.1 - 1978); Specification For Ball Valves (Horizontal Plunger Type - BIS 1977
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